chore(deps): update canonical/charming-actions action to v2.6.2 #288

Job	Run time
Run Tests / Integration Test (argo-controller)	21m 29s
Run Tests / Lint Code (argo-controller)	38s
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Lint Code (argo-server)	31s
Run Tests / Unit Tests (argo-controller)	55s
Run Tests / Unit Tests (argo-server)	30s
Run Tests / Check libraries (argo-controller) / Lint	18s
Run Tests / Check libraries (argo-controller) / Check libraries	31s
Run Tests / Check libraries (argo-server) / Check libraries	4s
Run Tests / Check libraries (argo-server) / Lint	19s
Publish Charm / Publish Charm (./charms/argo-controller)	4m 20s
Publish Charm / Publish Charm (./charms/argo-server)	3m 29s
	33m 7s

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