Update changelog (Azure#27130)

Author: xiangyan99

sdk/core/azure-core/CHANGELOG.md

@@ -1,16 +1,11 @@
 # Release History
 
-## 1.26.1 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
-
-### Bugs Fixed
+## 1.26.1 (2022-11-03)
 
 ### Other Changes
 
-- Added example of RequestsTransport with custom session.  (thanks to @inirudebwoy for the contribution)   #26768 
+- Added example of RequestsTransport with custom session.  (thanks to @inirudebwoy for the contribution)   #26768
+- Added Python 3.11 support.
 
 ## 1.26.0 (2022-10-06)