minor: fix linkcheck violation on trailing slash in new version of exec-maven-plugin
minor: fix linkcheck violation on trailing slash in new version of exec-maven-plugin

romani/checkstyle,romani/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,rnveach/checkstyle,romani/checkstyle,rnveach/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,romani/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,romani/checkstyle,rnveach/checkstyle