release notes

Author: mgravell

docs/ReleaseNotes.md

@@ -8,7 +8,7 @@ Current package versions:
 
 ## Unreleased
 
-- (none)
+- Add `GCRA` support (and remove experimental flag on `VSIM`) ([#3041 by @mgravell](https://github.com/StackExchange/StackExchange.Redis/pull/3041))
 
 ## 2.12.4