fixed base branch for deployment workflows

[ccampbell-fearless]

Description of changes

• Fixes for the check-for-changes job in the deployment workflows
  • changed base for comparing file changes
  • added git checkout for workflows triggered by push events

[github-actions]

Package	Line Rate	Branch Rate	Health
.	100%	100%	✔
api	98%	86%	✔
api.serializers	97%	88%	✔
api.views	91%	96%	✔
audit	95%	80%	✔
audit.cross_validation	97%	86%	✔
audit.fixtures	84%	50%	❌
audit.formlib	92%	62%	✔
audit.intakelib	89%	83%	➖
audit.intakelib.checks	92%	86%	✔
audit.intakelib.common	98%	82%	✔
audit.intakelib.transforms	100%	95%	✔
audit.management.commands	78%	17%	❌
audit.migrations	100%	100%	✔
audit.models	91%	68%	✔
audit.templatetags	100%	100%	✔
audit.test_viewlib	100%	100%	✔
audit.views	75%	52%	❌
census_historical_migration	96%	65%	✔
census_historical_migration.migrations	100%	100%	✔
census_historical_migration.sac_general_lib	92%	84%	✔
census_historical_migration.transforms	95%	90%	✔
census_historical_migration.workbooklib	68%	69%	❌
config	78%	37%	❌
curation	98%	100%	✔
curation.curationlib	88%	72%	➖
curation.migrations	100%	100%	✔
dissemination	91%	69%	✔
dissemination.analytics	27%	0%	❌
dissemination.forms	80%	30%	❌
dissemination.migrations	97%	25%	✔
dissemination.models	100%	100%	✔
dissemination.report_generation	21%	0%	❌
dissemination.report_generation.excel	32%	0%	❌
dissemination.searchlib	61%	43%	❌
dissemination.templatetags	52%	6%	❌
dissemination.views	67%	47%	❌
djangooidc	53%	38%	❌
djangooidc.tests	100%	94%	✔
report_submission	100%	96%	✔
report_submission.migrations	100%	100%	✔
report_submission.templatetags	74%	100%	❌
report_submission.views	78%	61%	❌
support	94%	75%	✔
support.migrations	100%	100%	✔
support.models	90%	50%	➖
tools	98%	50%	✔
users	95%	86%	✔
users.fixtures	100%	83%	✔
users.management	100%	100%	✔
users.management.commands	100%	100%	✔
users.migrations	100%	100%	✔
Summary	89% (22254 / 25087)	69% (2707 / 3926)	➖

Minimum allowed line rate is 85%