ci(track): bump upload-charm action 2.4.0 -> 2.6.2 #645

Job	Run time
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Get integration environments	3s
Run Tests / Lint Check	17s
Run Tests / Unit Test	25s
Run Tests / Check libraries / Check libraries	22s
Run Tests / Check libraries / Lint	10s
Publish Charm / Publish Charm (./)	3m 53s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k mlflowserver-v1)	16m 34s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k mlflowserver-v2)	16m 31s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k xgboost-v1)	15m 46s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k huggingface)	15m 47s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k sklearn-v2)	14m 56s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k tensorflow)	17m 6s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k xgboost-v2)	16m 17s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k tf-serving)	15m 42s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k sklearn-v1)	16m 22s
Run Tests / Integration Test (build and deploy) (charm-integration --)	23m 2s
	2h 53m 16s

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