Fix branch rules callout docs link

What does this MR do and why?

This MR fixes the docs link in the branch rules callout fragment to fix haml-lint.

See gitlab-org/quality/engineering-productivity/master-broken-incidents#8780 (closed)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

How to set up and validate locally

1. Run bundle exec haml-lint app/views/projects/settings/_branch_rules_callout.html.haml
2. See that it exits with no errors

added Engineering Productivity maintenancerefactor master:broken pipelineexpedited labels

assigned to @kkloss

added typemaintenance label

mentioned in incident gitlab-org/quality/engineering-productivity/master-broken-incidents#8780 (closed)

mentioned in merge request !166654 (merged)

added backend frontend labels

	2 Warnings
	The master pipeline status page reported failures in haml-lint If these jobs fail in your merge request with the same errors, then they are not caused by your changes. Please check for any on-going incidents in the incident issue tracker or in the #master-broken Slack channel.
	This merge request does not refer to an existing milestone.

Reviewer roulette

Category	Reviewer	Maintainer
backend	@olaoluro (UTC+1, 1 hour behind author)	@rzwambag (UTC+2, same timezone as author)
frontend	@dftian (UTC-10, 12 hours behind author)	@rob.hunt (UTC+1, 1 hour behind author)

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Generated by Danger

requested review from @ddieulivol

approved this merge request

@kkloss Looks good to me, thanks!

FYI @ddieulivol @kkloss this caused a broken master event as the spec wasn't updated. I'm submitting a fix now.

Friday 2024-10-04 09:40 UTC - Expedited MR led ... (gitlab-org/quality/engineering-productivity/master-broken-incidents#8783 - closed)

Oh yes, we have pipelineexpedited on this MR! I should have caught that.

@marcel.amirault has already submitted a fix Re-enable haml-lint in docs pipelines (!168195 - merged) which @kkloss has approved.

Will approve and get it merged.

started a merge train

merged

mentioned in commit 4cf5c7f9

changed the description

mentioned in incident gitlab-org/quality/engineering-productivity/master-broken-incidents#8783 (closed)

added workflowstaging-canary label

added workflowcanary label and removed workflowstaging-canary label

added workflowstaging label and removed workflowcanary label

added workflowproduction label and removed workflowstaging label

changed milestone to %17.5

added workflowpost-deploy-db-staging label and removed workflowproduction label

added workflowpost-deploy-db-production label and removed workflowpost-deploy-db-staging label

added releasedcandidate label

added releasedpublished label and removed releasedcandidate label