.github: add a yml to auto assign new PRs and issues to sig project (#2598)#2606

sre-bot wants to merge 1 commit into

pingcap:release-2.1pingcap/docs:release-2.1from

sre-bot:release-2.1-3ff99d643484sre-bot/docs:release-2.1-3ff99d643484Copy head branch name to clipboard