Eventhub: corrected upcoming release description (#12185)

* corrected the Upcoming Release in change log

* Update ChangeLog.md

Co-authored-by: Yunchi Wang <[email protected]>

Author: Ajit Navasare

src/EventHub/EventHub/ChangeLog.md

@@ -18,7 +18,7 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
-* Added Managed Identity parameters to 1New-AzEventHubNamespace1 and 1Set-AzEventHubNamespace1 cmdlets
+* Added Managed Identity parameters to `New-AzEventHubNamespace` and `Set-AzEventHubNamespace` cmdlets
 
 ## Version 1.4.3
 * Fix for issue 10634 : Fix the null Object reference for remove eventhubnamespace