GitLab

* Updates the default branch from master to main

* Links from `master` to `main`

* Typo

* Update examples/flax/README.md
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* Updated stale bot

* Specify issue number

* Remove particular handling of assignees

* Unleash the stalebot

* Remove debug branch

* Add stale bot to Github Actions

* Update message

* Message for assignee

* Update scripts/stale.py

* Uncomment & stop testing