No HTTPS URLs used in release comments

[paulmenzel]

To save a redirect, and prevent certain kinds of attacks, HTTPS URLs could be used in the comment of a release.

$ curl -I http://modwsgi.readthedocs.org/en/latest/release-notes/version-4.9.2.html
HTTP/1.1 301 Moved Permanently
Date: Sat, 25 Jun 2022 10:14:06 GMT
Content-Type: text/html
Content-Length: 162
Connection: keep-alive
Location: http://modwsgi.readthedocs.io/en/latest/release-notes/version-4.9.2.html
X-Backend: web-i-07998207642928d5e
X-Served: Nginx-Domain-Redirect
CF-Cache-Status: DYNAMIC
Server: cloudflare
CF-RAY: 720cef320f33aca4-TXL