Bump puma from 4.3.5 to 4.3.12

Bumps [puma](https://github.com/puma/puma) from 4.3.5 to 4.3.12.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v4.3.5...v4.3.12)

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

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

Gemfile.lock

@@ -141,7 +141,7 @@ GEM
     mustermann-grape (1.0.1)
       mustermann (>= 1.0.0)
     newrelic_rpm (6.11.0.365)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.11.4)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -153,7 +153,7 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    puma (4.3.5)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)