chore(deps): update dependency ubuntu to v24 #350

Job	Run time
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Charm-specific Integration tests (microk8s) (tensorboard-controller)	50s
Run Tests / Integration Test	53s
Run Tests / Charm-specific Integration tests (microk8s) (tensorboards-web-app)	47s
Run Tests / Lint Check (tensorboard-controller)	15s
Run Tests / Unit Test (tensorboard-controller)	18s
Run Tests / Lint Check (tensorboards-web-app)	14s
Run Tests / Unit Test (tensorboards-web-app)	20s
Run Tests / Check libraries (tensorboard-controller) / Check libraries	27s
Run Tests / Check libraries (tensorboards-web-app) / Check libraries	30s
Run Tests / Check libraries (tensorboard-controller) / Lint	11s
Run Tests / Check libraries (tensorboards-web-app) / Lint	11s
Run Tests / Terraform (tensorboard-controller) / Apply	0s
Run Tests / Terraform (tensorboard-controller) / Lint Terraform	8s
Run Tests / Terraform (tensorboards-web-app) / Apply	0s
Run Tests / Terraform (tensorboards-web-app) / Lint Terraform	7s
Run Tests / Terraform (tensorboard-controller) / Check / Check Terraform	8s
Run Tests / Terraform (tensorboards-web-app) / Check / Check Terraform	7s
Publish Charm / Publish Charm (./charms/tensorboards-web-app)	42s
Publish Charm / Publish Charm (./charms/tensorboard-controller)	53s
	7m 4s

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