chore: update docs linting tools and docs linting container image

Evan Readrequested to merge
eread/update-linting-tools-and-linting-container-image-for-docs into main

Description

For gitlab-org/technical-writing/docs-gitlab-com#657, let's update linting tools and linting container image for documentation.

Documentation

If this MR adds or updates CLI command documentation, follow the conventions in the GitLab CLI (glab) documentation style guide, run make gen-docs, and commit the updated files in docs/source/.

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