update changelog (Azure#25492)

sdk/core/azure-core/CHANGELOG.md

@@ -1,19 +1,13 @@
 # Release History
 
-## 1.25.0 (Unreleased)
+## 1.25.0 (2022-08-04)
 
 Azure-core is supported on Python 3.7 or later. For more details, please read our page on [Azure SDK for Python version support policy](https://github.com/Azure/azure-sdk-for-python/wiki/Azure-SDKs-Python-version-support-policy).
 
 ### Features Added
 
 - Added `CaseInsensitiveDict` implementation in `azure.core.utils` removing dependency on `requests` and `aiohttp`
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.24.2 (2022-06-30)
 
 ### Bugs Fixed