Pin tensorflow 2.12.0 (#3492)

Author: jeff-shepherd

sdk/python/dev-requirements.txt

@@ -6,8 +6,8 @@ papermill==2.3.3
 pandas==2.0.3
 matplotlib==3.7.3
 torch==2.1.0
-tensorflow==2.9.3
+tensorflow==2.12.0
 tensorflow-hub==0.15.0
 transformers==4.34.0
-keras==2.9
+keras==2.12.0
 jupyter-client==7.4.9