Correct a typo in README

Author: felixonmars

README.rst

@@ -5,7 +5,7 @@ A flake8 extension that checks for blind, catch-all ``except:`` and ``except Exc
 
 As of `pycodestyle 2.1.0 <https://github.com/PyCQA/pycodestyle/commit/543f12b06592c53e2e60edc4846ee02ab9550e8b/>`_, "E722 do not use bare except, specify exception instead" is built-in. However, bare ``Exception`` and ``BaseException`` are still allowed. This extension flags them as `B902`.
 
-Using ``except`` without explicitly specifying which exceptions to catch is generally considered bad practice, since it catches system signals like ``SIGINT``. You probably want to handle system interrupts differently than exceptions occuring in your code.
+Using ``except`` without explicitly specifying which exceptions to catch is generally considered bad practice, since it catches system signals like ``SIGINT``. You probably want to handle system interrupts differently than exceptions occurring in your code.
 
 It's also usually better style to have many small ``try``-``except`` blocks catching specific exceptions instead of a giant ``try:`` block with a catch-all ``except:`` at the bottom. It's also nicer to your fellow programmers to be a bit more specific about what exceptions they can expect in specific parts of the code, and what the proper course of action is when they occur.