manually remove Nones from the CHANGELOG

[sbillinge]

Problem

Due to (presumably) an earlier issue with the news/TEMPLATE.rst some news files replaced a bunch of * <news item> to * None (i.e., in 79.rst and 83.rst) which then ended up as ugly Nones in the CHANGELOG.rst

Proposed solution

So a fix is to make a PR that manually removes the Nones from the CHANGELOG.rst, and that may be all as whatever the issue was seems to have been fixed? I can ask one of our folks to do that to save you time @vincefn.