chapter_recurrent-neural-networks/rnn-scratch (#887)
chapter_recurrent-neural-networks/rnn-scratch (#887)

* fix errors in 8.5. Implementation of RNN from Scratch

* fix errors in 8.5.1. One-Hot Encoding

* fix errors in 8.5.2. Initializing the Model Parameters

* fix errors in 8.5.3. RNN Model

* fix errors in 8.5.4. Prediction

* fix errors in 8.5.5. Gradient Clipping

* fix errors in 8.5.6. Training

* end of fix errors in 8.5.

* Some fixes

* change the title for uniform translation

Co-authored-by: goldmermaid <fcb00cecbf879d17a80f4ce26a389eda39da7621@berkeley.edu>
d2l-ai/d2l-zh,mli/gluon-tutorials-zh,d2l-ai/d2l-zh,mli/gluon-tutorials-zh,d2l-ai/d2l-zh,mli/gluon-tutorials-zh,mli/gluon-tutorials-zh