ci(github): fix footnote link (#12182)

## Motivation

There was a typo in the footnote link.

## Supporting documentation

Part of Kong/team-mesh#302

Signed-off-by: Charly Molter <[email protected]>

.github/workflows/check.yaml

@@ -32,6 +32,7 @@ jobs:
                 - Don't forget `ci/` labels to run additional/fewer tests
             - [ ] Does this contain a change that needs to be notified to users? In this case, [`UPGRADE.md`](../blob/master/UPGRADE.md) should be updated.
             - [ ] Does it need to be backported according to the [backporting policy](../blob/master/CONTRIBUTING.md#backporting)? ([this](https://github.com/kumahq/kuma/actions/workflows/auto-backport.yaml) GH action will add "backport" label based on these [file globs](https://github.com/kumahq/kuma/blob/master/.github/workflows/auto-backport.yaml#L6), if you want to prevent it from adding the "backport" label use [no-backport-autolabel](https://github.com/kumahq/kuma/blob/master/.github/workflows/auto-backport.yaml#L8) label)
+            
             [1]: https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword
       - name: Check PR title
         # This job checks the PR title using