chore: bump maps app to v3

The upcoming version `7.0.0` of OpenCloud Web removes support for apps
using the old AMD format. Hence we need to bump the maps app to
`v3.0.0` to ensure it runs with the new version of Web.

config/opencloud/apps/maps/manifest.json

@@ -1,3 +1,3 @@
 {
-  "entrypoint": "js/maps-uKkx1qsf.js"
-}
+  "entrypoint": "js/remoteEntry-lxWu31Tr.mjs"
+}