Bump actions/upload-artifact@v4 following blocking deprecation via ht…

…tps://github.com/atlassian-labs/compiled/actions/runs/13124206809/job/36617003663\?pr\=1792 leading to https://github.com/actions/upload-artifact/blob/main/docs/MIGRATION.md showing no noticable issues (#1793)

.github/workflows/visual-regression-test.yml

@@ -48,7 +48,8 @@ jobs:
 
       - name: Archive screenshots
         if: ${{ failure() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: visual-regression-screenshots
           path: .loki
+          include-hidden-files: true