Right RunButton tittle (#24)

You can run the code with `ctrl+k` not `ctrl+r` cuz this will just reload the page on the web

Author: AbdallahEssamGaber

src/components/RunButton/index.jsx

@@ -7,7 +7,7 @@ const RunButton = ({ loading, dispatch, code }) => (
   <button
     data-toggle="tooltip"
     data-placement="top"
-    title="Run Code (CtrCmd + R)"
+    title="Run Code (CtrCmd + k)"
     onClick={() => dispatch(codeActions.executeCode(code))}
     disabled={loading}
     className="btn btn-success"