Update dependency connection_pool to v3

Author: renovate[bot]

Gemfile

@@ -27,7 +27,7 @@ gem 'stringex'
 gem 'terser'
 
 group :production do
-  gem 'connection_pool', '< 3'   # 3.x requires keyword args; pin to 2.x for Rails 7.2.3
+  gem 'connection_pool', '< 4'   # 3.x requires keyword args; pin to 2.x for Rails 7.2.3
   gem 'dalli'
   gem 'pg'
 end

Gemfile.lock

@@ -116,7 +116,7 @@ GEM
     cgi (0.5.1)
     climate_control (1.2.0)
     concurrent-ruby (1.3.6)
-    connection_pool (2.5.5)
+    connection_pool (3.0.2)
     crack (1.0.1)
       bigdecimal
       rexml
@@ -444,7 +444,7 @@ DEPENDENCIES
   binding_of_caller
   bootsnap
   climate_control
-  connection_pool (< 3)
+  connection_pool (< 4)
   dalli
   debug
   dotenv-rails