Update CHANGELOGs for initial release (Azure#2155)

Author: heaths

sdk/core/azure_core/CHANGELOG.md

@@ -1,9 +1,7 @@
-# 0.2.1 (2022-04)
+# Release History
 
-- [#625](https://github.com/Azure/azure-sdk-for-rust/pull/625) Improved Error Handling
-- [#690](https://github.com/Azure/azure-sdk-for-rust/pull/690) Better header insertion handling
-- [#691](https://github.com/Azure/azure-sdk-for-rust/pull/691) Better header handling
+## 0.22.0 (2025-02-13)
 
-# 0.1.1 (2022-01)
+### Features Added
 
-- initial publish to [crates.io](https://crates.io/crates/azure_core)
+- Initial supported release.

sdk/eventhubs/azure_messaging_eventhubs/CHANGELOG.md

@@ -1,5 +1,7 @@
+# Release History
+
 ## 0.1.0 (2025-02-13)
 
 ### Features Added
 
--   Initial release.
+- Initial supported release.

sdk/identity/azure_identity/CHANGELOG.md

@@ -1,6 +1,10 @@
 # Release History
 
-## 0.22.0 (Unreleased)
+## 0.22.0 (2025-02-13)
+
+### Features Added
+
+- Initial supported release.
 
 ### Breaking Changes
 

sdk/keyvault/azure_security_keyvault_keys/CHANGELOG.md

@@ -1,13 +1,8 @@
 # Release History
 
-## 0.1.0 (Unreleased)
+## 0.1.0 (2025-02-13)
 
 ### Features Added
 
-- Initial publish to [crates.io](https://crates.io/crates/azure_security_keyvault_keys) built on Azure Key Vault service version 7.6-preview.2.
-
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+- Initial public release.
+- Built on Azure Key Vault service version 7.6-preview.2.

sdk/keyvault/azure_security_keyvault_secrets/CHANGELOG.md

@@ -1,13 +1,8 @@
 # Release History
 
-## 0.1.0 (Unreleased)
+## 0.1.0 (2025-02-13)
 
 ### Features Added
 
-- Initial publish to [crates.io](https://crates.io/crates/azure_security_keyvault_secrets) built on Azure Key Vault service version 7.6-preview.2.
-
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+- Initial public release.
+- Built on Azure Key Vault service version 7.6-preview.2.