GitHub branch protection on `main`

[guidoiaquinti]

Proposed change

We currently can't enable branch protection on main as we have few GH actions relying on it being disabled:

1️⃣ update-docs.yml 2️⃣ bump-version.yml 3️⃣ test-kubetest-store-durations.yaml

Alternative options

Do nothing

Additional context

Update docs could (and in my opinion should) be converted as a pre-commit hook, for the other 2 I don't have solutions yet.

[macobo]

I think this can be solved by setting "Restrict who can push to matching branches" and making sure that commits are made by posthog bot not ourselves. :)