add dumpling-lightning-job #7386

Job	Run time
check-git-conflicts	1s
markdownlint	1s
check-control-characters	1s
check-file-encoding	1s
check-manual-line-breaks	1s
check-unclosed-tags	1s
verify-internal-link-anchors	1s
verify-internal-links	1s
	8s

Provide feedback