webpubsub, prepare release 2022-11 (Azure#32883)

* Update release date

* update CHANGELOG on dependency updates

Author: haolingdong-msft

sdk/webpubsub/azure-messaging-webpubsub/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Release History
 
-## 1.2.0 (Unreleased)
+## 1.2.0 (2023-01-11)
 
 ### Bugs Fixed
 
@@ -18,6 +18,8 @@
 #### Dependency Updates
 
 - Updated `api-version` to `2022-11-01`.
+- Upgraded `azure-core` from `1.34.0` to version `1.35.0`.
+- Upgraded `azure-core-http-netty` from `1.12.7` to version `1.12.8`.
 
 ## 1.1.8 (2022-11-09)