Fix version number in 4.9.1 release notes in NEWS.txt

Author: rcordovano

NEWS.txt

@@ -1,8 +1,8 @@
----------------- VERSION 4.9.0  --------------
+---------------- VERSION 4.9.1  --------------
 Bug Fixes:
-- Fixed possible ingest deadlock from Image Gallery database inserts
-- Image Gallery does not need lock on Case DB during pre-population, which makes UI more responsive
-- Other misc Image Gallery fixes
+- Fixed possible ingest deadlock from Image Gallery database inserts.
+- Image Gallery does not need lock on Case DB during pre-population, which makes UI more responsive.
+- Other misc Image Gallery fixes.
 
 ---------------- VERSION 4.9.0  --------------