Update the Youtube link about miss-islington (#246)

Author: amaajemyfren

README.rst

@@ -38,5 +38,5 @@ automatically merged once all the CI checks passed.
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 According to Wikipedia, Miss Islington is the name of the witch in the
-`Monty Python and the Holy Grail <https://www.youtube.com/watch?v=k3jt5ibfRzw&feature=youtu.be>`_
+`Monty Python and the Holy Grail <https://www.youtube.com/watch?v=yp_l5ntikaU>`_
 sketch.