Update setup.py encoding='utf-8'

>> py .\setup.py

Traceback (most recent call last):
  File "annotated_deep_learning_paper_implementations\setup.py", line 4, in <module>
                       ^^^^^^^^
UnicodeDecodeError: 'gbk' codec can't decode byte 0xa8 in position 951: illegal multibyte sequence

Author: xBoyMinemc

setup.py

@@ -1,6 +1,6 @@
 import setuptools
 
-with open("readme.md", "r") as f:
+with open("readme.md", "r", encoding="utf-8") as f:
     long_description = f.read()
 
 setuptools.setup(