Notebook divergence, update header and footer (#402)

* notebook: divergences; update notebook formatting

* notebook divergence: updates,figure metadata

* Divergence nb: run notebook

* make code across one line

* make code one line to fix myst errors from precommit

* rm space around = sign

* nb divergence: fix myst error with spacing

* make Authorship section consistent betw notebook and myst

* remove myst file

* divergence notebook, after running pre-commit

* run myst for divergence nb

* added RS authorship to end

* rerun myst on divergence nb

* divergence nb: rerun myst

Author: reshamas