Bump handlebars from 4.4.2 to 4.4.3

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.4.2 to 4.4.3.
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/wycats/handlebars.js/blob/master/release-notes.md)
- [Commits](https://github.com/wycats/handlebars.js/compare/v4.4.2...v4.4.3)

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

package.json

@@ -37,7 +37,7 @@
         "@actions-rs/core": "0.0.5",
         "@actions/core": "^1.1.1",
         "@actions/github": "^1.1.0",
-        "handlebars": "^4.4.2"
+        "handlebars": "^4.4.3"
     },
     "devDependencies": {
         "@typescript-eslint/eslint-plugin": "^2.4.0",