Bump ex_doc from 0.28.2 to 0.28.3
Bump ex_doc from 0.28.2 to 0.28.3

Bumps [ex_doc](https://github.com/elixir-lang/ex_doc) from 0.28.2 to 0.28.3.
- [Release notes](https://github.com/elixir-lang/ex_doc/releases)
- [Changelog](https://github.com/elixir-lang/ex_doc/blob/main/CHANGELOG.md)
- [Commits](https://github.com/elixir-lang/ex_doc/compare/v0.28.2...v0.28.3)

---
updated-dependencies:
- dependency-name: ex_doc
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
bors-ng/bors-ng,bors-ng/bors-ng,bors-ng/bors-ng