Checking milestone and generating changelog#3125

Merged

SylvainCorlay merged 2 commits intojupyter-widgets:masterfrom

jasongrout:changelog8

Feb 18, 2021

Commits on Feb 17, 2021

Add brief, rough instructions for checking the PR milestones and generating a list of PRs for release notes.
jasongrout
committed
Update release_template.txt to be markdown
jasongrout
committed