chore(deps): update dependency connection_pool to v2.5.2

Author: renovate[bot]

Gemfile.lock

@@ -113,7 +113,7 @@ GEM
       amq-protocol (~> 2.3, >= 2.3.1)
       sorted_set (~> 1, >= 1.0.2)
     concurrent-ruby (1.3.5)
-    connection_pool (2.5.0)
+    connection_pool (2.5.2)
     crack (1.0.0)
       bigdecimal
       rexml