Test

Install RDoc under .bundle/gems instead #1267

Job	Run time
ruby-versions / Generate Ruby versions	3s
test (3.0, ubuntu-latest)	27s
test (3.0, macos-latest)	23s
test (3.0, windows-latest)	1m 27s
test (3.1, ubuntu-latest)	28s
test (3.1, macos-latest)	26s
test (3.1, windows-latest)	2m 37s
test (3.2, ubuntu-latest)	23s
test (3.2, macos-latest)	20s
test (3.2, windows-latest)	1m 25s
test (3.3, ubuntu-latest)	24s
test (3.3, macos-latest)	23s
test (3.3, windows-latest)	1m 43s
test (3.4, ubuntu-latest)	24s
test (3.4, macos-latest)	20s
test (head, ubuntu-latest)	41s
test (head, macos-latest)	30s
test (head, windows-latest)	2m 11s
test (truffleruby, ubuntu-latest)	2m 26s
test (truffleruby, macos-latest)	2m 4s
test (truffleruby-head, ubuntu-latest)	3m 29s
test (truffleruby-head, macos-latest)	2m 9s
	24m 43s

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