Swap to PHP 8.1 #108

Job	Run time
CI / Generate matrix	9s
CI / Context	1s
CI / Check governance	1s
CI / 8.1 mysql57 phpunit recipe-core	16m 36s
CI / 8.1 mysql57 phpunit framework-orm	22m 41s
CI / 8.1 mysql57 phpunit framework-core	23m 37s
CI / 8.1 mysql57 phpunit recipe-cms	17m 25s
CI / 8.1 mysql57 phpunit recipe-ccl	8m 55s
CI / 8.1 mysql57 phpunit recipe-authoring-tools	6m 26s
CI / 8.1 mysql57 phpunit recipe-blog	8m 30s
CI / 8.1 mysql57 phpunit recipe-collaboration	8m 8s
CI / 8.1 mysql57 phpunit recipe-content-blocks	11m 19s
CI / 8.1 mysql57 phpunit recipe-form-building	11m 1s
CI / 8.1 mysql57 phpunit recipe-reporting-tools	7m 54s
CI / 8.1 mysql57 phpunit recipe-services	6m 49s
CI / 8.1 mysql57 phpunit optional-authenticators	6m 45s
CI / 8.1 mysql57 phpunit mfa	8m 13s
CI / 8.1 mysql57 phpunit other	14m 6s
CI / 8.1 prf-low mysql57 phpunit recipe-cms	16m 59s
CI / 8.2 mysql57 phpunit recipe-cms	16m 55s
CI / Check unreleased changes	0s
CI / Patch release	0s
	3h 32m 30s

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