remove WIP in the title of quantization 2.0

Author: leslie-fang-intel

prototype_source/quantization_in_pytorch_2_0_export_tutorial.rst

@@ -1,8 +1,10 @@
-(Work in Progress) Quantization in PyTorch 2.0 Export Tutorial
+(Prototype) Quantization in PyTorch 2.0 Export Tutorial
 ==============================================================
 
 **Author**: `Leslie Fang <https://github.com/leslie-fang-intel>`_, `Weiwen Xia <https://github.com/Xia-Weiwen>`__, `Jiong Gong <https://github.com/jgong5>`__, `Kimish Patel <https://github.com/kimishpatel>`__, `Jerry Zhang <https://github.com/jerryzh168>`__
 
+.. note:: This tutorial is a work in progress.
+
 Today we have `FX Graph Mode
 Quantization <https://pytorch.org/docs/stable/quantization.html#prototype-fx-graph-mode-quantization>`__
 which uses ``symbolic_trace`` to capture the model into a graph, and then