Add workflow to generate stats for release (#6836)
Add workflow to generate stats for release (#6836)

This adds triggering the PR Stats GitHub Action for a canary release. It compares the latest canary release with the last stable release and posts it as a comment to the commit. 
flybayer/next.js,JeromeFitz/next.js,BlancheXu/test,BlancheXu/test,JeromeFitz/next.js,azukaru/next.js,zeit/next.js,azukaru/next.js,flybayer/next.js,BlancheXu/test,JeromeFitz/next.js,zeit/next.js,flybayer/next.js,azukaru/next.js,azukaru/next.js,zeit/next.js,flybayer/next.js,JeromeFitz/next.js