Describe the bug

PR #1474 moved the docs to the docs/ directory, and also changed casing of some filenames.

• docs/changelog.md -> docs/CHANGELOG.md
• docs/contributing.md -> docs/CONTRIBUTING.md

This changed URL path parameters as well. URL paths to these pages must now be uppercased when accessing the deployed docs.

How to reproduce

For example, navigating to https://pipx.pypa.io/stable/CONTRIBUTING/ shows the correct page.

But navigating to https://pipx.pypa.io/stable/contributing/ displays a (poorly styled) 404 page:

Note that the casing changes do not affect the homepage because MkDocs automatically handles README.md as index.md.

Expected behavior

The previous URLs would continue to work:

• https://pipx.pypa.io/stable/changelog/
• https://pipx.pypa.io/stable/contributing/