Update riva_release month (#60)

Author: rmittal-github

riva/client/package_info.py

@@ -22,5 +22,5 @@
 __license__ = 'MIT'
 __keywords__ = 'deep learning, machine learning, gpu, NLP, ASR, TTS, NMT, nvidia, speech, language, Riva, client'
 __riva_version__ = "2.14.0"
-__riva_release__ = "23.10"
+__riva_release__ = "23.12"
 __riva_models_version__ = "2.14.0"