Restore docs/antora.yml #1211

Job	Run time
Prism	26s
Specs \| 2.7	56s
Specs \| 3.0	26s
Coding Style \| 3.0	29s
Specs \| 3.1	26s
Main Gem Specs \| RuboCop: master \| 2.7	2m 12s
Specs \| 3.2	29s
Main Gem Specs \| RuboCop: master \| 3.0	1m 45s
Specs \| 3.3	24s
Main Gem Specs \| RuboCop: v1.61.0 \| 3.3	1m 51s
Specs \| head	24s
Coverage \| 2.7	45s
Specs "modern" \| 3.0	28s
Specs \| jruby	51s
Specs \| jruby-head	41s
Specs \| truffleruby	51s
Specs \| truffleruby-head	1m 4s
	14m 28s

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