Docs: fix the ReadTheDocs pipeline

[nhoening]

Description

Fixing the RTD build pipeline problems.

• Fix the problem.
• Added changelog item in documentation/changelog.rst

Closes #1971

[read-the-docs-community]

Documentation build overview

📚 flexmeasures | 🛠️ Build #31431441 | 📁 Comparing a20646e against latest (0904e02)

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Show files changed (82 files in total): 📝 79 modified | ➕ 0 added | ➖ 3 deleted

File	Status
changelog.html	📝 modified
genindex.html	📝 modified
py-modindex.html	📝 modified
_autosummary/flexmeasures.api.common.responses.html	📝 modified
_autosummary/flexmeasures.api.common.schemas.assets.html	📝 modified
_autosummary/flexmeasures.api.common.schemas.generic_schemas.html	📝 modified
_autosummary/flexmeasures.api.common.schemas.search.html	📝 modified
_autosummary/flexmeasures.api.common.schemas.sensor_data.html	📝 modified
_autosummary/flexmeasures.api.common.schemas.sensors.html	📝 modified
_autosummary/flexmeasures.api.common.schemas.users.html	📝 modified
_autosummary/flexmeasures.api.common.utils.api_utils.html	📝 modified
_autosummary/flexmeasures.api.common.utils.deprecation_utils.html	📝 modified
_autosummary/flexmeasures.api.common.utils.validators.html	📝 modified
_autosummary/flexmeasures.api.v3_0.assets.html	📝 modified
_autosummary/flexmeasures.api.v3_0.sensors.html	📝 modified
_autosummary/flexmeasures.api.v3_0.users.html	📝 modified
_autosummary/flexmeasures.auth.decorators.html	📝 modified
_autosummary/flexmeasures.auth.error_handling.html	📝 modified
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_autosummary/flexmeasures.cli.data_edit.html	📝 modified
_autosummary/flexmeasures.cli.monitor.html	📝 modified
_autosummary/flexmeasures.cli.utils.html	📝 modified
_autosummary/flexmeasures.data.html	📝 modified
_autosummary/flexmeasures.data.models.annotations.html	📝 modified
_autosummary/flexmeasures.data.models.audit_log.html	📝 modified
_autosummary/flexmeasures.data.models.data_sources.html	📝 modified
_autosummary/flexmeasures.data.models.forecasting.html	📝 modified
_autosummary/flexmeasures.data.models.forecasting.model_spec_factory.html	📝 modified
_autosummary/flexmeasures.data.models.forecasting.pipelines.base.html	📝 modified
_autosummary/flexmeasures.data.models.forecasting.pipelines.predict.html	📝 modified
_autosummary/flexmeasures.data.models.forecasting.pipelines.train.html	📝 modified
_autosummary/flexmeasures.data.models.forecasting.utils.html	📝 modified
_autosummary/flexmeasures.data.models.generic_assets.html	📝 modified
_autosummary/flexmeasures.data.models.parsing_utils.html	📝 modified
_autosummary/flexmeasures.data.models.planning.html	📝 modified
_autosummary/flexmeasures.data.models.planning.linear_optimization.html	📝 modified
_autosummary/flexmeasures.data.models.planning.process.html	📝 modified
_autosummary/flexmeasures.data.models.planning.storage.html	📝 modified
_autosummary/flexmeasures.data.models.planning.utils.html	📝 modified
_autosummary/flexmeasures.data.models.reporting.aggregator.html	📝 modified
_autosummary/flexmeasures.data.models.reporting.pandas_reporter.html	📝 modified
_autosummary/flexmeasures.data.models.reporting.profit.html	📝 modified
_autosummary/flexmeasures.data.models.task_runs.html	📝 modified
_autosummary/flexmeasures.data.models.time_series.html	📝 modified
_autosummary/flexmeasures.data.models.user.html	📝 modified
_autosummary/flexmeasures.data.queries.annotations.html	📝 modified
_autosummary/flexmeasures.data.queries.generic_assets.html	📝 modified
_autosummary/flexmeasures.data.queries.utils.html	📝 modified
_autosummary/flexmeasures.data.schemas.attributes.html	📝 modified
_autosummary/flexmeasures.data.schemas.forecasting.html	📝 modified
_autosummary/flexmeasures.data.schemas.forecasting.pipeline.html	📝 modified
_autosummary/flexmeasures.data.schemas.generic_assets.html	📝 modified
_autosummary/flexmeasures.data.schemas.io.html	📝 modified
_autosummary/flexmeasures.data.schemas.reporting.aggregation.html	📝 modified
_autosummary/flexmeasures.data.schemas.reporting.html	📝 modified
_autosummary/flexmeasures.data.schemas.reporting.pandas_reporter.html	📝 modified
_autosummary/flexmeasures.data.schemas.reporting.profit.html	📝 modified
_autosummary/flexmeasures.data.schemas.scheduling.html	📝 modified
_autosummary/flexmeasures.data.schemas.scheduling.process.html	📝 modified
_autosummary/flexmeasures.data.schemas.scheduling.storage.html	📝 modified
_autosummary/flexmeasures.data.schemas.sensors.html	📝 modified
_autosummary/flexmeasures.data.schemas.times.html	📝 modified
_autosummary/flexmeasures.data.schemas.units.html	📝 modified
_autosummary/flexmeasures.data.schemas.users.html	📝 modified
_autosummary/flexmeasures.data.scripts.data_gen.html	➖ deleted
_autosummary/flexmeasures.data.scripts.html	➖ deleted
_autosummary/flexmeasures.data.scripts.visualize_data_model.html	➖ deleted
_autosummary/flexmeasures.data.services.annotations.html	📝 modified
_autosummary/flexmeasures.data.services.data_sources.html	📝 modified
_autosummary/flexmeasures.data.services.scheduling.html	📝 modified
_autosummary/flexmeasures.data.services.sensors.html	📝 modified
_autosummary/flexmeasures.data.services.users.html	📝 modified
_autosummary/flexmeasures.data.services.utils.html	📝 modified
_autosummary/flexmeasures.ui.utils.breadcrumb_utils.html	📝 modified
_autosummary/flexmeasures.utils.calculations.html	📝 modified
_autosummary/flexmeasures.utils.entity_address_utils.html	📝 modified
_autosummary/flexmeasures.utils.flexmeasures_inflection.html	📝 modified
_autosummary/flexmeasures.utils.time_utils.html	📝 modified
_autosummary/flexmeasures.utils.unit_utils.html	📝 modified
_autosummary/flexmeasures.utils.validation_utils.html	📝 modified
api/v3_0.html	📝 modified
tut/toy-example-setup.html	📝 modified