feat(workflow): extend (skip ci) feature

mentioned in commit 0cd2eca1

mentioned in merge request to-be-continuous/samples/php-cnb-on-kubernetes!23 (merged)

mentioned in merge request to-be-continuous/samples/golang-cnb-on-kubernetes!27 (merged)

mentioned in merge request to-be-continuous/samples/php-on-kubernetes!70 (merged)

mentioned in merge request to-be-continuous/samples/python-on-kubernetes!25 (closed)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!80 (merged)

mentioned in merge request to-be-continuous/samples/python-on-kubernetes!33 (merged)