message: Fix broken examples link in Python Tink doc.
diff: @@ -18,5 +18,5 @@ Google Assistant, Firebase, the Android Search App, etc.
  For an overview of using Tink in Python, see https://developers.google.com/tink.
  In addition, there are illustrative [examples of using Tink
  -Python](https://github.com/google/tink/tree/master/examples/python/) which can
  +Python](https://github.com/google/tink/tree/master/python/examples/) which can
  used as a jumping off point.
  