DOC-3978 Add log rotation enhancement to release notes

Author: rrelledge

content/operate/rs/release-notes/rs-7-6-releases/rs-7-6-0-tba.md

@@ -27,7 +27,7 @@ This version offers:
 
 ### Enhancements
 
-- TBA
+- Added support for [log rotation]({{<relref "/operate/rs/clusters/logging/log-security#log-rotation">}}) based on both size and time.
 
 #### Redis module feature sets