.github: Bump actions/upload-artifact from 3 to 4 #95

Job	Run time
privileged	1s
windows	1s
test (amd64, -coverprofile=/tmp/coverage.out)	1s
race-root-integration (1/4)	1s
race-root-integration (2/4)	1s
android	1s
test (amd64, -race, 1/3)	1s
race-root-integration (3/4)	1s
test (amd64, -race, 2/3)	1s
race-root-integration (4/4)	1s
test (amd64, -race, 3/3)	1s
crossmin (plan9, amd64)	1s
cross (linux, arm64)	1s
crossmin (aix, ppc64)	1s
test (386)	1s
cross (linux, 386)	1s
cross (linux, loong64)	1s
ios	1s
race-build	1s
cross (linux, arm, 5)	1s
vm	0s
cross (linux, arm, 7)	1s
fuzz	1s
wasm	1s
depaware	1s
cross (darwin, amd64)	1s
cross (darwin, arm64)	1s
go_generate	1s
go_mod_tidy	1s
cross (windows, amd64)	1s
licenses	1s
cross (windows, arm64)	1s
staticcheck (linux, amd64)	1s
cross (freebsd, amd64)	1s
staticcheck (windows, amd64)	1s
tailscale_go	1s
cross (openbsd, amd64)	1s
staticcheck (darwin, amd64)	1s
staticcheck (windows, 386)	1s
notify_slack	7s
check_mergeability	1s
	46s

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