Prep azcore for release (#21879)

sdk/azcore/CHANGELOG.md

@@ -1,8 +1,6 @@
 # Release History
 
-## 1.9.0-beta.2 (Unreleased)
-
-### Features Added
+## 1.9.0 (2023-11-06)
 
 ### Breaking Changes
 > These changes affect only code written against previous beta versions of `v1.7.0` and `v1.8.0`

sdk/azcore/internal/shared/constants.go

@@ -38,5 +38,5 @@ const (
 	Module = "azcore"
 
 	// Version is the semantic version (see http://semver.org) of this module.
-	Version = "v1.9.0-beta.2"
+	Version = "v1.9.0"
 )