Added known performance issue to RS 7.22 release notes

Author: rrelledge

content/operate/rs/release-notes/rs-7-22-releases/_index.md

@@ -109,6 +109,8 @@ The following table provides a snapshot of supported platforms as of this Redis
 
     For down: 2-1000000
 
+- RS156570: Redis Enterprise Software version 7.22.0 can experience a significant performance impact when using search indexes with vector fields of type HNSW. This issue is characterized by elevated CPU usage, even during idle periods, due to periodic database information collection for metrics and monitoring. This behavior can also affect other database operations. For example, the `FT.INFO` command can become long-running on such indexes.
+
 ## Known limitations
 
 #### Upload modules before OS upgrade

content/operate/rs/release-notes/rs-7-22-releases/rs-7-22-0-28.md

@@ -271,6 +271,8 @@ The following table shows the SHA256 checksums for the available packages:
 
     For down: 2-1000000
 
+- RS156570: Redis Enterprise Software version 7.22.0 can experience a significant performance impact when using search indexes with vector fields of type HNSW. This issue is characterized by elevated CPU usage, even during idle periods, due to periodic database information collection for metrics and monitoring. This behavior can also affect other database operations. For example, the `FT.INFO` command can become long-running on such indexes.
+
 ## Known limitations
 
 #### Upload modules before OS upgrade