Bump phpunit/phpunit from 12.5.6 to 12.5.8 #459

Job	Run time
Release Management / Set Milestone / Supported Versions Matrix	4s
Release Management / Required Labels / Required Labels	4s
Release Management / Craft Release	-1s
Release Management / Diff	-1s
Release Management / Set Milestone / Supported Threading Matrix / Supported Threading Matrix	4s
Release Management / Set Milestone / Figure out what the version should be	37s
Release Management / Set Milestone / Set Milestone / Set Milestone	10s
	57s

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