Modify env $PATH in ~/.profile

Refer to https://github.com/kennethreitz/python-guide/pull/471

Author: akayj

docs/starting/install/osx.rst

@@ -47,7 +47,7 @@ The script will explain what changes it will make and prompt you before the
 installation begins.
 Once you've installed Homebrew, insert the Homebrew directory at the top
 of your :envvar:`PATH` environment variable. You can do this by adding the following
-line at the bottom of your :file:`~/.bashrc` file
+line at the bottom of your :file:`~/.profile` file
 
 .. code-block:: console