Update actions/upload-artifact action to v7

Author: renovate[bot]

.github/workflows/main.yml

@@ -80,7 +80,7 @@ jobs:
         run: pnpm percy exec -- pnpm ci:cypress
         timeout-minutes: 60
       - name: Store artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: cypress-artifacts