tinymist::ci

build: bump version to 0.12.20-rc2 (#1341) #2

Job	Run time
build (alpine-x64)	0s
Check clippy, formatting, and documentation	2m 10s
build (web)	1m 14s
build (win32-x64)	14m 41s
Check minimum Rust version	9m 30s
build (win32-arm64)	5s
Duplicate Actions Detection	4s
build (linux-x64)	8m 20s
build (linux-arm64)	3s
build (linux-armhf)	4s
build (darwin-x64)	8s
build (darwin-arm64)	8m 19s
release	0s
publish	0s
	44m 38s

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