update versions (#35525)

Author: ninghu

sdk/ml/azure-ai-ml/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Release History
 
-## 1.16.0 (unreleased)
+## 1.16.0b1 (2024-05-07)
 
 ### Features Added
 - Add experimental support for working with Promptflow evaluators: `ml_client.evaluators`.
@@ -142,7 +142,7 @@
 
 ### Other Changes
 
-- `azure-ai-ml` now performs all file i/o on `utf-8` encoded files per Azure SDK guidance. 
+- `azure-ai-ml` now performs all file i/o on `utf-8` encoded files per Azure SDK guidance.
   (instead of the default behavior for python < 3.15, which uses locale specific encodings)
 - Removed references to deprecated "feature_store" workspace connection type.
 

sdk/ml/azure-ai-ml/azure/ai/ml/_version.py

@@ -2,4 +2,4 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # ---------------------------------------------------------
 
-VERSION = "1.16.0"
+VERSION = "1.16.0b1"