Schema tests: make GitHub message reflect the app repo
Schema tests: make GitHub message reflect the app repo

Currently the message is clashing with the Specialist Publisher v1
schema tests.

alphagov/specialist-publisher,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher,alphagov/specialist-publisher