Merge pull request #34189 from orhantoy/fix-link-to-concurrent-ruby-docs

[ci skip] Fix link to Concurrent::ThreadPoolExecutor docs

activejob/lib/active_job/queue_adapters/async_adapter.rb

@@ -31,7 +31,7 @@ module QueueAdapters
     # jobs. Since jobs share a single thread pool, long-running jobs will block
     # short-lived jobs. Fine for dev/test; bad for production.
     class AsyncAdapter
-      # See {Concurrent::ThreadPoolExecutor}[https://ruby-concurrency.github.io/concurrent-ruby/Concurrent/ThreadPoolExecutor.html] for executor options.
+      # See {Concurrent::ThreadPoolExecutor}[https://ruby-concurrency.github.io/concurrent-ruby/master/Concurrent/ThreadPoolExecutor.html] for executor options.
       def initialize(**executor_options)
         @scheduler = Scheduler.new(**executor_options)
       end