Slim down PR template. (#18864) #4307

Job	Run time
Build wheel and source distribution	27s
aarch64-unknown-linux-gnu (ubuntu-22.04)	3m 40s
x86_64-unknown-linux-gnu (ubuntu-22.04)	3m 33s
x86_64-unknown-linux-musl (ubuntu-22.04)	4m 0s
powerpc64le-unknown-linux-gnu (ubuntu-22.04)	3m 41s
x86_64-pc-windows-msvc (windows-2022)	6m 54s
i686-pc-windows-msvc (windows-2022)	8m 53s
aarch64-apple-darwin (macos-12)	4m 42s
x86_64-apple-darwin (macos-12)	4m 43s
Build macOS installer and sign/notarize artifacts	1m 20s
Build Windows installers	56s
Publish release	0s
	42m 49s

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