Bump handlebars in /scripts in the npm_and_yarn group across 1 directory (#620)

Bumps the npm_and_yarn group with 1 update in the /scripts directory: [handlebars](https://github.com/handlebars-lang/handlebars.js).


Updates `handlebars` 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: indirect
  dependency-group: npm_and_yarn
...

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Author: dependabot[bot]