tinymist::ci

feat: move nightly from v0.12.19 to v0.12.21 #649

Job	Run time
build (alpine-x64)	0s
build (win32-x64)	16m 10s
build (win32-arm64)	7s
build (linux-x64)	16m 9s
build (web)	1m 12s
build (linux-arm64)	4s
build (linux-armhf)	4s
build (darwin-x64)	8s
Check clippy, formatting, and documentation	2m 18s
build (darwin-arm64)	16m 13s
Check minimum Rust version	44s
Duplicate Actions Detection	4s
release	0s
publish	0s
	53m 13s

Provide feedback