Fix broken documentation links

[eleftherias]

Summary

The Minder Cloud docs server at https://docs.stacklok.com/minder/ adds a trailing slash to the URL path. This was causing some of our links to be broken.

Ref https://github.com/stacklok/docs/issues/238

Change Type

Mark the type of change your PR introduces:

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Outline how the changes were tested, including steps to reproduce and any relevant configurations.
Attach screenshots if helpful.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 52.213%. remained the same
when pulling cc7499d on eleftherias:fix-docs-links
into 8187e7e on stacklok:main.