Update CHANGELOG.md (Azure#20631)

Author: Rakshith Bhyravabhotla

sdk/monitor/azure-monitor-query/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Release History
 
-## 1.0.0b4 (09-09-2021)
+## 1.0.0b4 (2021-09-09)
 
 ### Features Added
 
@@ -40,8 +40,6 @@
 
 - `include_statistics` and `include_visualization` args can now work together.
 
-### Other Changes
-
 ## 1.0.0b3 (2021-08-09)
 
 ### Features Added