flathub-data-checker action was renamed to external-data-checker

Author: barthalion

.github/workflows/flathub-data-checker.yml .github/workflows/external-data-checker.yml

@@ -7,6 +7,6 @@ jobs:
   flathub-data-checker:
     runs-on: ubuntu-latest
     steps:
-    - uses: flathub/actions/flathub-data-checker@master
+    - uses: flathub/actions/external-data-checker@master
       env:
         GITHUB_TOKEN: ${{ secrets.FLATHUBBOT_TOKEN }}