Bump moment from 2.29.1 to 2.29.4

Bumps [moment](https://github.com/moment/moment) from 2.29.1 to 2.29.4.
- [Release notes](https://github.com/moment/moment/releases)
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](moment/moment@2.29.1...2.29.4)

---
updated-dependencies:
- dependency-name: moment
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -35,7 +35,7 @@
     "@c8y/style": "^1011.0.12",
     "angular-resize-event": "^2.1.0",
     "leaflet2": "npm:leaflet@1.7.1",
-    "moment": "^2.26.0",
+    "moment": "^2.29.4",
     "rxjs": "~6.6.3",
     "tslib": "^2.0.0",
     "zone.js": "~0.11.3"