Merge pull request #23177 from Yoast/dependabot/github_actions/actions/checkout-6

GH Actions: Bump actions/checkout from 4 to 6

Author: enricobattocchi

.github/workflows/build-zip.yml

@@ -58,7 +58,7 @@ jobs:
             core.setOutput('ref', pr.head.ref);
 
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ steps.pr.outputs.ref || '' }}