Merge pull request #922 from flippercloud/frozen-string

Fix frozen strings for ruby 3.4

Author: jnunemaker

lib/flipper/cloud/configuration.rb

@@ -245,7 +245,7 @@ def set_option(name, options, default: nil, typecast: nil, minimum: nil, from_en
         if required
           option_value = send(name)
           if option_value.nil? || option_value.empty?
-            message = "Flipper::Cloud #{name} is missing. Please "
+            message = String.new("Flipper::Cloud #{name} is missing. Please ")
             message << "set #{env_var} or " if from_env
             message << "provide #{name} (e.g. Flipper::Cloud.new(#{name}: value))."
             raise ArgumentError, message

lib/flipper/instrumentation/log_subscriber.rb

@@ -56,7 +56,7 @@ def adapter_operation(event)
         operation = event.payload[:operation]
         result = event.payload[:result]
 
-        description = 'Flipper '
+        description = String.new('Flipper ')
         description << "feature(#{feature_name}) " unless feature_name.nil?
         description << "adapter(#{adapter_name}) "
         description << "#{operation} "