pin to ubuntu-22.04 as default runner OS #1635

Job	Run time
Generate Site (ubuntu-22.04, temurin@11)	1m 16s
Submit Dependencies	0s
Validate Steward Config (ubuntu-22.04, temurin@11)	10s
Build and Test (ubuntu-22.04, 2.12, temurin@8, sbt-typelevelJVM)	4m 10s
Build and Test (ubuntu-22.04, 2.12, temurin@11, sbt-typelevelJVM)	1m 59s
Build and Test (ubuntu-22.04, 2.12, temurin@17, sbt-typelevelJVM)	2m 2s
Build and Test (ubuntu-22.04, 2.12, graal_22.3.2@11, sbt-typelevelJVM)	1m 39s
Build and Test (ubuntu-22.04, 2.12, graalvm@21, sbt-typelevelJVM)	2m 10s
Build and Test (ubuntu-22.04, 2.12, corretto@17, sbt-typelevelJVM)	2m 4s
Build and Test (ubuntu-22.04, 2.12, semeru@17, sbt-typelevelJVM)	2m 26s
Build and Test (macos-latest, 2.12, temurin@17, sbt-typelevelJVM)	1m 49s
Build and Test (windows-latest, 2.12, temurin@8, sbt-typelevelJVM)	3m 0s
Publish Artifacts	0s
	22m 45s

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