Fix forums link

[Qronikarz]

Description

Points to the forums on GitHub just like the Bottles Website

Fixes #3611 task nr 3.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
  Readme change

How Has This Been Tested?

Just the Preview tab next to Write tab on GitHub to check if link opens correctly.

• Test A
• Test B

[TheEvilSkeleton]

Can you run git commit --amend and edit the commit message to something that follows the GNOME Project Handbook? https://handbook.gnome.org/development/commit-messages.html

If not, I can do it and merge it, it's no big deal.

[Qronikarz]

If not, I can do it and merge it, it's no big deal.

Please do.
You can even delete this PR and make your own if you deem that easier. I don't particularly care.

[TheEvilSkeleton]

No worries, thanks a lot for updating the links throughout Bottles ^^