test

Bump actions/upload-artifact from 4 to 6 #108

Job	Run time
ruby-versions / Generate Ruby versions	6s
build (2.3 / windows-latest)	3m 43s
build (2.3 / ubuntu-latest)	23s
build (2.1 / windows-latest)	1m 11s
build (2.2 / ubuntu-latest)	29s
build (2.1 / ubuntu-latest)	17s
build (2.5 / ubuntu-latest)	24s
build (2.4 / ubuntu-latest)	26s
build (2.6 / macos-latest)	35s
build (2.5 / windows-latest)	1m 43s
build (2.6 / ubuntu-latest)	29s
build (2.6 / windows-latest)	1m 53s
build (3.2 / ubuntu-latest)	10s
build (3.0 / windows-latest)	1m 2s
build (3.0 / macos-latest)	18s
build (2.4 / windows-latest)	1m 20s
build (3.2 / windows-latest)	56s
build (3.4 / ubuntu-latest)	13s
build (2.2 / windows-latest)	1m 31s
build (2.7 / windows-latest)	1m 40s
build (3.3 / windows-latest)	1m 10s
build (3.1 / macos-latest)	21s
build (3.1 / windows-latest)	55s
build (3.4 / macos-latest)	13s
build (3.2 / macos-latest)	14s
build (2.7 / ubuntu-latest)	23s
build (3.1 / ubuntu-latest)	9s
build (3.4 / windows-latest)	1m 15s
build (3.0 / ubuntu-latest)	12s
build (truffleruby-head / macos-latest)	23s
build (head / macos-latest)	14s
build (3.3 / ubuntu-latest)	12s
build (2.7 / macos-latest)	40s
build (truffleruby-head / ubuntu-latest)	24s
build (head / ubuntu-latest)	8s
build (3.3 / macos-latest)	15s
build (head / windows-latest)	1m 1s
	26m 58s

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