Bump guardian/.github/.github/workflows/require-label.yaml

Bumps [guardian/.github/.github/workflows/require-label.yaml](https://github.com/guardian/.github) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/guardian/.github/releases)
- [Commits](guardian/.github@d8e9938...0293750)

---
updated-dependencies:
- dependency-name: guardian/.github/.github/workflows/require-label.yaml
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/check-labels.yaml

@@ -6,4 +6,4 @@ on:
     types: [opened, labeled, unlabeled, synchronize, reopened, edited]
 jobs:
   require-label:
-    uses: guardian/.github/.github/workflows/require-label.yaml@d8e99387686ec439e37c883ba9bb8ab2b43a6b81 #  v3.0.0
+    uses: guardian/.github/.github/workflows/require-label.yaml@02937505d39c570351300878870233e0b1a5e073 #  v3.1.0