fix typo

Author: yghstill

python/paddle/fluid/contrib/slim/quantization/post_training_quantization.py

@@ -222,7 +222,7 @@ def __init__(self,
  be different. In address this problem, fuse the pattern before
  quantization. Default False.
  is_use_cache_file(bool, optional): This param is deprecated.
- quant_blocks(int|list, optional): The bolck id list with quantiazaion.
+ quant_blocks(int|list, optional): The bolck id list with quantization.
  Default is -1, it will quant all blocks. And it can be set [0, 1] etc.
  cache_dir(str, optional): This param is deprecated.
  Returns: