Bump puma from 6.4.2 to 6.4.3

Bumps [puma](https://github.com/puma/puma) from 6.4.2 to 6.4.3.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v6.4.2...v6.4.3)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:development
...

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

Gemfile.lock

@@ -312,9 +312,9 @@ GEM
  psych (5.1.2-java)
  jar-dependencies (>= 0.1.7)
  public_suffix (6.0.0)
- puma (6.4.2)
+ puma (6.4.3)
  nio4r (~> 2.0)
- puma (6.4.2-java)
+ puma (6.4.3-java)
  nio4r (~> 2.0)
  raabro (1.4.0)
  racc (1.8.0)