Bump puma from 4.3.8 to 4.3.9 (brotandgames#116)

Bumps [puma](https://github.com/puma/puma) from 4.3.8 to 4.3.9.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v4.3.8...v4.3.9)

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

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

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

Gemfile.lock

@@ -127,7 +127,7 @@ GEM
  mocha (1.9.0)
  metaclass (~> 0.0.1)
  msgpack (1.3.1)
- nio4r (2.5.7)
+ nio4r (2.5.8)
  nokogiri (1.12.5)
  mini_portile2 (~> 2.6.1)
  racc (~> 1.4)
@@ -138,7 +138,7 @@ GEM
  prometheus-client (0.9.0)
  quantile (~> 0.2.1)
  public_suffix (4.0.6)
- puma (4.3.8)
+ puma (4.3.9)
  nio4r (~> 2.0)
  quantile (0.2.1)
  raabro (1.1.6)