chore(deps): update canonical/charming-actions action to v2.6.2 #886

Job	Run time
Run Tests / Individual charm's integration tests (controller)	12m 57s
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Bundle Integration	15m 58s
Run Tests / Individual charm's integration tests (ui)	12m 41s
Run Tests / Lint Code (controller)	19s
Run Tests / Unit Test (controller)	22s
Run Tests / Lint Code (ui)	22s
Run Tests / Unit Test (ui)	25s
Run Tests / Check libraries (jupyter-controller) / Check libraries	23s
Run Tests / Check libraries (jupyter-controller) / Lint	9s
Run Tests / Check libraries (jupyter-ui) / Check libraries	21s
Run Tests / Check libraries (jupyter-ui) / Lint	9s
Publish Charm / Publish Charm (./charms/jupyter-ui)	3m 57s
Publish Charm / Publish Charm (./charms/jupyter-controller)	3m 33s
	51m 39s

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