⬇️(dependency) downgrade workbox-webpack-plugin to 7.1.0

In the 1.8.0 we experienced issues with the service
worker not updating properly. We suspect that the
workbox-webpack-plugin is the cause of this issue.
Better to downgrade to the last version that worked
until we have time to investigate the issue.
We add workbox-webpack-plugin to the renovate.json
file to avoid future updates.

src/frontend/apps/impress/package.json

@@ -66,6 +66,6 @@
     "stylelint-prettier": "5.0.2",
     "typescript": "*",
     "webpack": "5.97.0",
-    "workbox-webpack-plugin": "7.3.0"
+    "workbox-webpack-plugin": "7.1.0"
   }
 }