Add concurrency settings #9

Job	Run time
Find latest pyenv version	6s
Build Python Builder Base	27s
Resolve Python Versions	31s
Build Python Versions (3.14, 3.14.0) / Build Python 3.14.0	59s
Build Python Versions (3.14t, 3.14.0t) / Build Python 3.14.0t	59s
Build Python Versions (3.13t, 3.13.9t) / Build Python 3.13.9t	1m 0s
Build Python Versions (3.14j, 3.14.0j) / Build Python 3.14.0j	59s
	5m 1s

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