Bump handlebars from 4.7.8 to 4.7.9 in /assets (#2229)

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:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

assets/package-lock.json

@@ -39,7 +39,7 @@
     "eslint-plugin-n": "^15.6.0",
     "eslint-plugin-promise": "^6.1.1",
     "fs-extra": "^11.1.0",
-    "handlebars": "^4.7.7",
+    "handlebars": "^4.7.9",
     "jsdom": "^26.0.0",
     "lodash.throttle": "^4.1.1",
     "lunr": "^2.3.8",