Git ignore `notes.html`.
Git ignore `notes.html`.

Since we're rebuilding notes.html independently each time we render it from notes.org,
and it adds complexity to understanding commit diffs.

If we want to share a specific notes.html version build, just rename the file -
something like notes-build.html - and that'll be tracked by git.

webappzero/the-value-of-learning,webappzero/cr17-to-zero,whilei/cr17-to-zero,webappzero/cr17-to-zero,webappzero/the-value-of-learning,webappzero/the-value-of-learning,whilei/cr17-to-zero,webappzero/cr17-to-zero,whilei/cr17-to-zero