Update install.md
Update install.md
d2l-ai/d2l-zh,mli/gluon-tutorials-zh,d2l-ai/d2l-zh,libennext/gluon-tutorials-zh,libennext/gluon-tutorials-zh,d2l-ai/d2l-zh,libennext/gluon-tutorials-zh,mli/gluon-tutorials-zh,mli/gluon-tutorials-zh,mli/gluon-tutorials-zh