[keyvault] keyvault-keys: prepare release (#26775)

### Packages impacted by this PR

- `@azure/keyvault-keys`

### Describe the problem that is addressed by this PR

Changelog updates for new Keys patch.

sdk/keyvault/keyvault-keys/CHANGELOG.md

@@ -1,18 +1,12 @@
 # Release History
 
-## 4.7.2 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
+## 4.7.2 (2023-08-10)
 
 ### Bugs Fixed
 
 - Fixed a bug where `listPropertiesOfKeysVersions` failed to retrieve the second page of results. Issue [#26547](https://github.com/Azure/azure-sdk-for-js/issues/26547); PR [#26584](https://github.com/Azure/azure-sdk-for-js/pull/26584).
 - Bumped `@azure/core-rest-pipeline` dependency to version including the `isRestError` helper, which was used in PR [#26016](https://github.com/Azure/azure-sdk-for-js/issues/26016).
 
-### Other Changes
-
 ## 4.7.1 (2023-06-06)
 
 ### Bugs Fixed