macos

[DOC] Doc for StringIO#putc #621

Job	Run time
ruby-versions / Generate Ruby versions	5s
macos-13 3.2	25s
macos-13 3.1	30s
macos-13 3.0	31s
macos-13 2.7	1m 10s
macos-13 3.3	25s
macos-13 3.4	46s
macos-13 jruby-head	1m 41s
macos-14 2.7	35s
macos-13 debug	35s
macos-14 3.1	21s
macos-13 head	27s
macos-14 debug	25s
macos-14 3.4	21s
macos-14 3.2	16s
macos-14 3.0	18s
macos-14 head	23s
macos-14 jruby-head	1m 3s
macos-14 3.3	21s
	10m 38s

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