GH Pages: fix previous releases sorting

[jrfnl]

Page

https://requests.ryanmccue.info/download/

Issue description

The sorting of the previous releases is off at the moment. Might need to use a different key to sort on.

PR #884 attempted to fix this, but that fix is not working.

Additional context

Possibly relevant links:

• https://jekyllrb.com/docs/liquid/filters/
• https://shopify.github.io/liquid/filters/sort_natural/
• https://docs.github.com/en/rest/releases/releases?apiVersion=2022-11-28

• I intend to create a pull request to implement this improvement myself.