Update RELEASE-NOTES.md

Author: hemantt

RELEASE-NOTES.md

@@ -1,6 +1,6 @@
 ## RELEASE NOTES
 
-### Version v2.64.5-EUI-CCD-RDM-8661-prerelease - January 4 2021
+### Version 2.64.5-EUI-CCD-RDM-8661-beta1 - January 4 2021
 **EUI-CCD-RDM-8661** 
 
 ### Version 2.64.4-EUI+Shuttering-prerelease - March 2 2020