Fix typo in global_executor_concurrency error message (rails#52103)

* Fix typo in `global_executor_concurrency` error message

* removed `using` and replace multi_thread_pool with `:multi_thread_pool`

Co-authored-by: Petrik de Heus <[email protected]>

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Co-authored-by: Petrik de Heus <[email protected]>
Co-authored-by: Rafael Mendonça França <[email protected]>

Author: 3 people

activerecord/lib/active_record.rb

@@ -301,7 +301,7 @@ def self.global_thread_pool_async_query_executor # :nodoc:
   # with the global thread pool async query executor.
   def self.global_executor_concurrency=(global_executor_concurrency)
     if self.async_query_executor.nil? || self.async_query_executor == :multi_thread_pool
-      raise ArgumentError, "`global_executor_concurrency` cannot be set when using the executor is nil or set to multi_thead_pool. For multiple thread pools, please set the concurrency in your database configuration."
+      raise ArgumentError, "`global_executor_concurrency` cannot be set when the executor is nil or set to `:multi_thread_pool`. For multiple thread pools, please set the concurrency in your database configuration."
     end
 
     @global_executor_concurrency = global_executor_concurrency