DOCSP-33285 Add Release Date to 6.0.10 RN (#4787) (#4884)

Author: ajhuh-mdb

source/release-notes/6.0.txt

@@ -49,8 +49,8 @@ Patch Releases
 
 .. _6.0.10-release-notes:
 
-6.0.10 - Upcoming
-~~~~~~~~~~~~~~~~~
+6.0.10 - Sep 14, 2023
+~~~~~~~~~~~~~~~~~~~~~
 
 - :issue:`SERVER-71627` Refreshed cached collection route info severely 
   blocks all client request when a cluster contains 1 million chunks