Update `check_python(minimum=3.6.2)` (#3548)

utils/general.py

@@ -136,7 +136,7 @@ def check_git_status(err_msg=', for updates see https://github.com/ultralytics/y
         print(f'{e}{err_msg}')
 
 
-def check_python(minimum='3.7.0', required=True):
+def check_python(minimum='3.6.2', required=True):
     # Check current python version vs. required python version
     current = platform.python_version()
     result = pkg.parse_version(current) >= pkg.parse_version(minimum)