Fix workflow badge #403

Job	Run time
test (ubuntu-latest, 2.5)	47s
test (ubuntu-latest, 2.6)	42s
test (ubuntu-latest, 2.7)	42s
test (ubuntu-latest, 3)	28s
test (ubuntu-latest, 3.1)	31s
test (ubuntu-latest, 3.2)	28s
test (ubuntu-latest, 3.3)	28s
test (ubuntu-latest, head)	10s
test (ubuntu-latest, jruby)	2m 53s
test (ubuntu-latest, jruby-head)	2m 49s
test (ubuntu-latest, truffleruby)	2m 5s
test (ubuntu-latest, truffleruby-head)	2m 27s
test (windows-latest, 2.5)	3m 34s
test (windows-latest, 2.6)	1m 52s
test (windows-latest, 2.7)	2m 9s
test (windows-latest, 3)	1m 44s
test (windows-latest, 3.1)	1m 11s
test (windows-latest, 3.2)	2m 30s
test (windows-latest, 3.3)	1m 19s
test (windows-latest, head)	1m 14s
test (windows-latest, jruby)	1m 36s
test (windows-latest, jruby-head)	1m 24s
test (macos-latest, 2.5)	1m 20s
test (macos-latest, 2.6)	1m 11s
test (macos-latest, 2.7)	1m 6s
test (macos-latest, 3)	47s
test (macos-latest, 3.1)	37s
test (macos-latest, 3.2)	59s
test (macos-latest, 3.3)	37s
test (macos-latest, head)	20s
test (macos-latest, jruby)	2m 20s
test (macos-latest, jruby-head)	2m 29s
test (macos-latest, truffleruby)	2m 17s
test (macos-latest, truffleruby-head)	2m 40s
	49m 46s

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