chore(deps-dev): bump the dev-dependencies group with 4 updates (#181)

Bumps the dev-dependencies group with 4 updates: [ash_postgres](https://github.com/ash-project/ash_postgres), [credo](https://github.com/rrrene/credo), [ex_doc](https://github.com/elixir-lang/ex_doc) and [igniter](https://github.com/ash-project/igniter).


Updates `ash_postgres` from 2.6.27 to 2.6.28
- [Release notes](https://github.com/ash-project/ash_postgres/releases)
- [Changelog](https://github.com/ash-project/ash_postgres/blob/main/CHANGELOG.md)
- [Commits](ash-project/ash_postgres@v2.6.27...v2.6.28)

Updates `credo` from 1.7.15 to 1.7.16
- [Release notes](https://github.com/rrrene/credo/releases)
- [Changelog](https://github.com/rrrene/credo/blob/master/CHANGELOG.md)
- [Commits](rrrene/credo@v1.7.15...v1.7.16)

Updates `ex_doc` from 0.39.3 to 0.40.1
- [Release notes](https://github.com/elixir-lang/ex_doc/releases)
- [Changelog](https://github.com/elixir-lang/ex_doc/blob/main/CHANGELOG.md)
- [Commits](elixir-lang/ex_doc@v0.39.3...v0.40.1)

Updates `igniter` from 0.7.0 to 0.7.2
- [Release notes](https://github.com/ash-project/igniter/releases)
- [Changelog](https://github.com/ash-project/igniter/blob/main/CHANGELOG.md)
- [Commits](ash-project/igniter@v0.7.0...v0.7.2)

---
updated-dependencies:
- dependency-name: ash_postgres
  dependency-version: 2.6.28
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: credo
  dependency-version: 1.7.16
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: ex_doc
  dependency-version: 0.40.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: igniter
  dependency-version: 0.7.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]