Prepare eventhubs for March 2026 Release (#3901)

Author: LarryOsterman

sdk/eventhubs/azure_messaging_eventhubs/CHANGELOG.md

@@ -1,17 +1,15 @@
 # Release History
 
-## 0.12.0 (Unreleased)
-
-### Features Added
+## 0.12.0 (2026-03-10)
 
 ### Breaking Changes
 
 - Support for `wasm32-unknown-unknown` has been removed ([#3377](https://github.com/Azure/azure-sdk-for-rust/issues/3377))
 
-### Bugs Fixed
-
 ### Other Changes
 
+- Updated dependencies.
+
 ## 0.11.0 (2026-02-11)
 
 ### Breaking Changes

sdk/eventhubs/azure_messaging_eventhubs_checkpointstore_blob/CHANGELOG.md

@@ -1,17 +1,15 @@
 # Release History
 
-## 0.6.0 (Unreleased)
-
-### Features Added
+## 0.6.0 (2026-03-10)
 
 ### Breaking Changes
 
 - Support for `wasm32-unknown-unknown` has been removed ([#3377](https://github.com/Azure/azure-sdk-for-rust/issues/3377))
 
-### Bugs Fixed
-
 ### Other Changes
 
+- Updated dependencies.
+
 ## 0.5.0 (2026-02-11)
 
 ### Breaking Changes