Update execution.md

AlexGuteniev · web-flow · commit 8df99c1e623b · 2021-08-16T16:47:17.000+03:00
diff --git a/docs/standard-library/execution.md b/docs/standard-library/execution.md
@@ -33,7 +33,7 @@ namespace std::execution {
 
 ### Microsoft Specific
  
-When `parallel_policy` or `parallel_unsequenced_policy` cause the algorithm to be parallelized, the parallel execution uses Windows Thread Pool. See [Thread Pools](https://docs.microsoft.com/en-us/windows/win32/procthread/thread-pools). Number of concurrent threads is limited to thread pool defaults (currently 500). Number of threads concurrently executing on hardware is currently limited by number of logical processor in the process's processor group. See [Processor Groups](https://docs.microsoft.com/en-us/windows/win32/procthread/processor-groups). Maximum number of chunks for data partitioning is also currently based on number of logical processor in the process's processor group.
+When `parallel_policy` or `parallel_unsequenced_policy` cause the algorithm to be parallelized, the parallel execution uses Windows Thread Pool. See [Thread Pools](https://docs.microsoft.com/en-us/windows/win32/procthread/thread-pools). Number of concurrent threads is limited to thread pool defaults (currently 500). Number of threads concurrently executing on hardware is currently limited by number of logical processor in the process's processor group, so effectively limited to 64. See [Processor Groups](https://docs.microsoft.com/en-us/windows/win32/procthread/processor-groups). Maximum number of chunks for data partitioning is also currently based on number of logical processor in the process's processor group.
 
 ## Requirements
 
