chore(deps): update canonical/charming-actions action to v2.7.0 #1131

Job	Run time
test / Build charm	2m 16s
test / Define spread matrix	22s
test / Check libraries	25s
test / Lint	15s
test / Unit tests	28s
test / Spread (deploy-bash:juju_3_5)	6m 33s
test / Spread (deploy-bash:juju_3_6)	9m 24s
test / Spread (deploy-python:juju_3_6)	7m 18s
test / Spread (deploy-python:juju_3_5)	1h 30m 51s
test / Spread (ingress-path:juju_3_5)	8m 39s
test / Spread (ingress-path:juju_3_6)	5m 56s
test / Spread (ingress:juju_3_5)	8m 45s
test / Spread (ingress:juju_3_6)	6m 21s
test / Spread (observability-relations:juju_3_5)	9m 26s
test / Spread (observability-relations:juju_3_6)	8m 29s
	2h 45m 28s

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