m1 macOS from source fixed.

Author: bigcat88

.gitignore

@@ -146,3 +146,4 @@ cython_debug/
 .DS_Store
 
 /out
+/wheelhouse/

README.md

@@ -46,10 +46,7 @@ pip install git+https://github.com/bigcat88/pillow_heif.git
 brew install libffi libheif
 pip3 install git+https://github.com/bigcat88/pillow_heif.git
 ```
-If on macOS it fails with installing from source, just try second time(helps me on M1 with Monterey):
-```
-pip3 install git+https://github.com/bigcat88/pillow_heif.git
-```
+
 
 ##### Windows
 With Visual Studio 2015+ C Compiler and SDK installed: