Don't show a deprecation warning for `EnsureNode#branch` just yet #1207

Job	Run time
Coding Style \| 3.0	35s
Prism	27s
Main Gem Specs \| RuboCop: master \| 2.7	2m 1s
Specs \| 2.7	36s
Main Gem Specs \| RuboCop: master \| 3.0	1m 33s
Main Gem Specs \| RuboCop: v1.61.0 \| 3.3	1m 56s
Specs \| 3.0	28s
Specs \| 3.1	29s
Specs \| 3.2	27s
Specs \| 3.3	29s
Specs \| head	25s
Coverage \| 2.7	45s
Specs "modern" \| 3.0	27s
Specs \| jruby	44s
Specs \| jruby-head	49s
Specs \| truffleruby	51s
Specs \| truffleruby-head	1m 4s
	14m 6s

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