Prepare for release (Azure#49770)

Author: christothes

sdk/identity/Azure.Identity/CHANGELOG.md

@@ -1,10 +1,6 @@
 # Release History
 
-## 1.14.0-beta.4 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
+## 1.14.0-beta.4 (2025-05-01)
 
 ### Bugs Fixed
 - Fixed an issue where Azure CLI credential could hang or delay due to I/O contention when standard input/output was shared with the host process ([#49582](https://github.com/Azure/azure-sdk-for-net/pull/49582)).