slim down grants_tagger dependencies

[ArneRobben]

Description

The updates required to make the grants_tagger wheel work. I also updated the Readme file with instruction on how to install the wheel in a Docker image.

Checklist

• [ ] Linked to Notion or GitHub issue
• [x] Added tests
• [x] Updated README
• [x] DVC up to date

Release checklist

• [x] DVC repro up to date
• [x] Models synced in S3
• [x] Version updated
• [x] CHANGELOG.md updated
• [x] Model and package version aligned

To release:

• make build
• make deploy