[Clang][Docs] Claim the atomic compare

I'm working on the implementation of OpenMP 5.1 feature `atomic compare`.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D100507

GitOrigin-RevId: 2a95cb5858f8bc0fed3956f72bd51bf6a948e660
diff --git a/docs/OpenMPSupport.rst b/docs/OpenMPSupport.rst
index 6a4cdf2..74d9a08 100644
--- a/docs/OpenMPSupport.rst
+++ b/docs/OpenMPSupport.rst
@@ -264,7 +264,9 @@
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 |Category                      | Feature                                                      | Status                   | Reviews                                                               |
 +==============================+==============================================================+==========================+=======================================================================+
-| atomic extension             | 'compare' and 'fail' clauses on atomic construct             | :none:`unclaimed`        |                                                                       |
+| atomic extension             | 'compare' clause on atomic construct                         | :good:`worked on`        |                                                                       |
++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
+| atomic extension             | 'fail' clause on atomic construct                            | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | base language                | C++ attribute specifier syntax                               | :part:`worked on`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+