Markdownlint error; switch to rumdl

[ns-rse]

We get a linting error with...

markdownlint-cli2........................................................Failed
- hook id: markdownlint-cli2
- exit code: 1

markdownlint-cli2 v0.19.0 (markdownlint v0.39.0)
Finding: .github/ISSUE_TEMPLATE/meeting_setup.md README.md posts/**/*.qmd *.qmd !_site/**/*.qmd !.github/ISSUE_TEMPLATE/*.md
Linting: 40 file(s)
Summary: 4 error(s)
posts/2024-10/index.qmd:36:332 error MD060/table-column-style Table column style [Table pipe does not align with heading for style "aligned"]
posts/2024-10/index.qmd:37:332 error MD060/table-column-style Table column style [Table pipe does not align with heading for style "aligned"]
posts/2024-10/index.qmd:38:332 error MD060/table-column-style Table column style [Table pipe does not align with heading for style "aligned"]
posts/2024-10/index.qmd:39:332 error MD060/table-column-style Table column style [Table pipe does not align with heading for style "aligned"]

This would also be an opportune moment to switch to or at least try out rumdl an implementation of markdownlint in Rust that I've wanted to give a whirl for a while.

It has a pre-commit hook available so it should be a case of switching to...

  - repo: https://github.com/rvben/rumdl-pre-commit
    rev: v0.0.180  # Use the latest release tag
    hooks:
      - id: rumdl
        args: [--fix]