Mention the Docs Discourse forum in the "Reporting Documentation Bugs" section

[Mariatta]

Documentation

On the section for reporting Documentation bugs, we tell people to use the "tracker" or to email docs@python.org about it.

The Documentation Discourse forum was not mentioned.

Let's mention the Discourse forum there.

Linked PRs

• GH-101616: Mention the Docs Discourse forum in the "reporting docs issues" #101617
• [3.11] GH-101616: Mention the Docs Discourse forum in the "reporting docs issues" (GH-101617) #101621
• [3.10] GH-101616: Mention the Docs Discourse forum in the "reporting docs issues" (GH-101617) #101622