[Security] Bump handlebars from 4.5.3 to 4.7.6 Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.5.3 to 4.7.6. **This update includes a security fix.** - [Release notes](https://github.com/wycats/handlebars.js/releases) - [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/master/release-notes.md) - [Commits](https://github.com/wycats/handlebars.js/compare/v4.5.3...v4.7.6) Signed-off-by: dependabot-preview[bot]