Run milestone job in master branch push event
Run milestone job in master branch push event

GitHub token which is used in pull_request event
from forked branch doesn't have a permission to update PR.
Find PR number from commit SHA and use it when
setting the milestone.
Additionally, upgrade actions/github-script to v4.

losipiuk/presto,ebyhr/presto,dain/presto,ebyhr/presto,Praveen2112/presto,ebyhr/presto,losipiuk/presto,Praveen2112/presto,ebyhr/presto,losipiuk/presto,Praveen2112/presto,dain/presto,ebyhr/presto,smartnews/presto,Praveen2112/presto,dain/presto,Praveen2112/presto,smartnews/presto,losipiuk/presto,dain/presto,losipiuk/presto,smartnews/presto,dain/presto,smartnews/presto,smartnews/presto