Update dependency puma to v6.6.0 (#541)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

v2.4-rails/Gemfile.lock

@@ -160,7 +160,7 @@ GEM
       racc (~> 1.4)
     psych (5.1.2)
       stringio
-    puma (6.5.0)
+    puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (3.1.8)