Update dependency tensorflow to v2.12.1 [SECURITY]

Author: renovate[bot]

requirements.txt

@@ -348,7 +348,7 @@ tensorboard==2.7.0
 tensorboard-data-server==0.6.1
 tensorboard-plugin-wit==1.8.0
 tensorboardX==2.4.1
-tensorflow==2.8.0
+tensorflow==2.12.1
 tensorflow-estimator==2.7.0
 tensorflow-hub==0.12.0
 tensorflow-io-gcs-filesystem==0.22.0