v1.3.7

Fixes

• Fix the issue that metrics of tiflash-server instance may not collected correctly (#1083, @yuzhibotao)
• Fix the issue that tiup-cluster disables monitoring services unexpectedly (#1088, @lucklove)
• Fix wrong dashboard name for lightning in Grafana after renaming a cluster with tiup-cluster (#1196, @9547)
• Fix the issue that tiup-cluster prune command may try to generate config for removed nodes (#1237, @lucklove)