Bump debug and browser-sync

Bumps [debug](https://github.com/debug-js/debug) to 2.6.9 and updates ancestor dependency [browser-sync](https://github.com/BrowserSync/browser-sync). These dependencies need to be updated together.


Updates `debug` from 2.6.8 to 2.6.9
- [Release notes](https://github.com/debug-js/debug/releases)
- [Changelog](https://github.com/debug-js/debug/blob/2.6.9/CHANGELOG.md)
- [Commits](debug-js/debug@2.6.8...2.6.9)

Updates `browser-sync` from 2.24.7 to 2.27.11
- [Release notes](https://github.com/BrowserSync/browser-sync/releases)
- [Changelog](https://github.com/BrowserSync/browser-sync/blob/master/CHANGELOG.md)
- [Commits](BrowserSync/browser-sync@v2.24.7...v2.27.11)

---
updated-dependencies:
- dependency-name: debug
  dependency-type: indirect
- dependency-name: browser-sync
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>