Update aks-preview safeguards to API version 2025-07-01 with idempotency check

Author: Jenny Liu

src/aks-preview/HISTORY.rst

@@ -11,7 +11,11 @@ To release a new version, please select a new version number (usually plus 1 to
 
 Pending
 +++++++
+* `az aks safeguards`: Update Deployment Safeguards commands to API version 2025-07-01 and add idempotency check for create operation.
 
+19.0.0b20
++++++++
+* `az aks bastion`: Add new option `--kubeconfig-path` to allow users to specify an existing kubeconfig file
 
 19.0.0b19
 +++++++