Fix README links

README.md

docs-src/docs/model_zoo.md

docs-src/mkdocs.yml

docs/404.html

docs/algorithms/index.html

docs/design/index.html

docs/index.html

docs/install/index.html

docs/jupyter/index.html

docs/model_zoo/index.html

docs/pruning/index.html

docs/quantization/index.html

docs/regularization/index.html

docs/schedule/index.html

docs/search.html

docs/search/search_index.json

docs/usage/index.html