Apply suggestions from code review

Co-authored-by: Mark Goddard <[email protected]>

Author: jackhodgkiss

roles/github/templates/run-config-diff.yml.j2

@@ -74,8 +74,8 @@ jobs:
         run: |
           cat /tmp/kayobe-config-diff
 
-      - name: Build artifact
-        uses: actions/upload-artifact@v3
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
         with:
          name: config-diff-artifacts
          path: |