Typo correction

Author: toby-griffiths

routing.rst

@@ -1424,7 +1424,7 @@ when importing the routes.
 
             # you can optionally exclude some files/subdirectories when loading attributes
             # (the value must be a string or an array of PHP glob patterns)
-            # NOTE: For now, this will onyl work if you are using the string, glob notation for the
+            # NOTE: For now, this will only work if you are using the string, glob notation for the
             #       resource value.  The array notation containing `path` & `namespace` will not work,
             #       and neither will using a non-glob string like `'../src/Controller'`.
             # exclude: '../../src/Controller/{Debug*Controller.php}'