Feature #584 resolve links

[jprestop]

Pull Request Testing

• Describe testing already performed for these changes:
  
  Ran sphinx-build -b linkcheck . _build/linkcheckl locally and verified that all of the link check problems were resolved.

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  
  Ensure all tests pass

• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [Yes]

• Do these changes include sufficient testing updates? [Yes]

• Will this PR result in changes to the test suite? [No]
  
  If yes, describe the new output and/or changes to the existing output:
  

• Do these changes introduce new SonarQube findings? [No]
  
  If yes, please describe:

• Please complete this pull request review by [Prior to the release].
  

Pull Request Checklist

See the METplus Workflow for details.

• Add any new Python packages to the METplus Components Python Requirements table.
• Review the source issue metadata (required labels, projects, and milestone).
• Complete the PR definition above.
• Ensure the PR title matches the feature or bugfix branch name.
• Define the PR metadata, as permissions allow.
  Select: Reviewer(s) and Development issue
  Select: Milestone as the version that will include these changes
  Select: Coordinated METplus-X.Y Support project for bugfix releases or METplotpy-X.Y.Z Development project for official releases
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• After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• Close the linked issue and delete your feature or bugfix branch from GitHub.

[JohnHalleyGotway]

I approve of these changes and note the following:

• All GHA tests pass, including the link checker, with no errors or warnings flagged.
• Applied consistent capitalization in section titles.
• Corrected some METplus URLs.
• Updated the list of URLs that should be ignored in conf.py due to a variety of issues.