Bump puma from 4.3.5 to 4.3.6

Bumps [puma](https://github.com/puma/puma) from 4.3.5 to 4.3.6.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v4.3.5...v4.3.6)

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

Gemfile.lock

@@ -30,11 +30,11 @@ GEM
     msgpack (1.3.3)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
+    nio4r (2.5.3)
     parallel (1.19.2)
     parser (2.7.1.4)
       ast (~> 2.4.1)
-    puma (4.3.5)
+    puma (4.3.6)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-protection (2.0.8.1)