Make PDM available when linting in release app

[sarayourfriend]

Fixes

Fixes this failure: https://github.com/WordPress/openverse/actions/runs/10782697007/job/29903186115

Description

Same issue that we found in #4866, but for the release GitHub workflow rather than CI/CD where we noticed it in the original PR.

I've searched for just lint in our GitHub Workflows and this is the only other one, I think.

Testing Instructions

Make sure I didn't miss other cases where Vale would run in GitHub Workflows where PDM would need to be available.

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• [N/A] I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• [N/A] I tried running the project locally and verified that there are no visible errors.
• [N/A] I ran the DAG documentation generator (ov just catalog/generate-docs for catalog
  PRs) or the media properties generator (ov just catalog/generate-docs media-props
  for the catalog or ov just api/generate-docs for the API) where applicable.

Developer Certificate of Origin

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[stacimc]

LGTM, I think that should do it 👍