grafana-tidb-dashboard: update DDL related metrics (#12750)#12772

Merged

shichun-0415 merged 2 commits intopingcap:release-5.1from ti-chi-bot:cherry-pick-12750-to-release-5.1

Mar 6, 2023

+1-1

Commits on Mar 6, 2023

This is an automated cherry-pick of pingcap#12750

shichun-0415
authored and
ti-chi-bot
committed
Update grafana-tidb-dashboard.md
shichun-0415
committed