Bump handlebars from 4.7.8 to 4.7.9 in /server/frontend

Bumps [handlebars](https://github.com/handlebars-lang/handlebars.js) from 4.7.8 to 4.7.9.
- [Release notes](https://github.com/handlebars-lang/handlebars.js/releases)
- [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/v4.7.9/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.7.8...v4.7.9)

---
updated-dependencies:
- dependency-name: handlebars
  dependency-version: 4.7.9
  dependency-type: direct:production
...

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

Author: dependabot[bot]

server/frontend/package-lock.json

@@ -16,7 +16,7 @@
     "axios": "^0.30.3",
     "d3": "^7.8.2",
     "floating-vue": "^5.2.2",
-    "handlebars": "^4.7.7",
+    "handlebars": "^4.7.9",
     "js-base64": "^3.6.1",
     "lodash": "^4.17.23",
     "sweetalert": "^2.1.2",