Bump esbuild from 0.17.15 to 0.21.4

Bumps [esbuild](https://github.com/evanw/esbuild) from 0.17.15 to 0.21.4.
- [Release notes](https://github.com/evanw/esbuild/releases)
- [Changelog](https://github.com/evanw/esbuild/blob/main/CHANGELOG-2023.md)
- [Commits](evanw/esbuild@v0.17.15...v0.21.4)

---
updated-dependencies:
- dependency-name: esbuild
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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