Broken link in Seq2Seq documentation

Hello,
In the documentation of Seq2Seq translation, the link at this point( Using teacher forcing causes it to converge faster but when the trained network is exploited, it may exhibit instability is broken.)

The working link now lives here: http://minds.jacobs-university.de/uploads/papers/ESNTutorialRev.pdf

It’d be nice to fix this, for easier reference and not to do a google search to find the relevant paper about Teacher Forcing.

Thanks!