ENH: small doc typo fix. (#474)

Author: wjjmjh

examples/implicit_refresh.py

@@ -38,7 +38,7 @@ def refresh_expiring_jwts(response):
             set_access_cookies(response, access_token)
         return response
     except (RuntimeError, KeyError):
-        # Case where there is not a valid JWT. Just return the original respone
+        # Case where there is not a valid JWT. Just return the original response
         return response