Fix binder link in docs

[rmorshea]

Link to binder in examples is still pointing to idom not idom-jupyter: https://github.com/idom-team/idom/blob/0379633721e227b9ce9f462b3a5a091f7689d66e/docs/source/examples.rst

[rmorshea]

This is already done.