chore(deps): update dependency puma to v6.4.3 [security]

Author: renovate[bot]

with-sinatra/Gemfile.lock

@@ -9,8 +9,8 @@ GEM
     multi_xml (0.6.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.7.0)
-    puma (6.4.2)
+    nio4r (2.7.3)
+    puma (6.4.3)
       nio4r (~> 2.0)
     rack (3.0.9.1)
     rack-protection (4.0.0)