increase timeout from 150 to 210 minutes
increase timeout from 150 to 210 minutes

because an attempt at a 2.12.0-M2 release build failed today
by running afoul of the old timeout

lrytz/scala-jenkins-infra,lrytz/scala-jenkins-infra,scala/scala-jenkins-infra,retronym/scala-jenkins-infra,retronym/scala-jenkins-infra,adriaanm/scala-jenkins-infra,adriaanm/scala-jenkins-infra,lrytz/scala-jenkins-infra,scala/scala-jenkins-infra,adriaanm/scala-jenkins-infra,retronym/scala-jenkins-infra