update macos build

README.md

@@ -5,9 +5,21 @@ This Python package is the same as the original QuickFIX package,
 except that it is compiled binaries for Linux and macOS.  
 source code: https://github.com/tangjicheng46/quickfix2  
 original source code: https://github.com/quickfix/quickfix  
+
 ## build
 ```
+# For Linux
 pip install -U setuptools wheel twine
-
 python setup.py bdist_wheel --plat-name=manylinux1_x86_64
+```
+
+```
+# For macos
+python setup.py bdist_wheel
+```
+
+### install
+```
+# after building, you will see the wheel package in the ./dist
+pip install ./dist/quickfix2-1.0.0-cp312-cp312-macosx_11_0_arm64.whl
 ```