Upgrade: Bump handlebars from 4.7.8 to 4.7.9

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]

package-lock.json

@@ -97,7 +97,7 @@
 		"foliate-js": "github:johnfactotum/foliate-js",
 		"font-list": "^2.0.2",
 		"fs-extra": "^11.3.3",
-		"handlebars": "^4.7.8",
+		"handlebars": "^4.7.9",
 		"heic-decode": "^2.1.0",
 		"image-size": "^2.0.2",
 		"jpegxr": "^0.3.0",