fix: annotations is a file not a param

[j23414]

Description of proposed changes

I was wondering why the dot was needed in

  annotations: './source-data/annotations.tsv'

and not in

  local_geolocation_rules: 'source-data/geolocation-rules.tsv'

The answer is that 'local_geolocation_rules" were marked as input files in the snakemake rule.

This change marks the annotation as an input file, basically to be consistent with the changes in #153

Related issue(s)

Testing

• Checks pass

[j23414]

Manual check seems to pass.

git clone https://github.com/nextstrain/monkeypox.git original
git clone https://github.com/nextstrain/monkeypox.git changed

cd original/ingest
nextstrain build . 

cd ../../changed/ingest
git checkout fix_annotations_path
nextstrain build . 

diff data/metadata.tsv ../../original/ingest/data/metadata.tsv | less # no changes