chore: update python dependencies + pin pip #985

Job	Run time
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Bundle Integration	4m 46s
Run Tests / Individual charm's integration tests (controller)	29m 51s
Run Tests / Individual charm's integration tests (ui)	30m 9s
Run Tests / Lint Code (controller)	33s
Run Tests / Unit Test (controller)	35s
Run Tests / Lint Code (ui)	57s
Run Tests / Unit Test (ui)	50s
Run Tests / Check libraries (jupyter-controller) / Lint	13s
Run Tests / Check libraries (jupyter-controller) / Check libraries	37s
Run Tests / Check libraries (jupyter-ui) / Check libraries	28s
Run Tests / Check libraries (jupyter-ui) / Lint	10s
Run Tests / Terraform (controller) / Apply / Apply Terraform	5m 21s
Run Tests / Terraform (controller) / Check / Check Terraform	11s
Run Tests / Terraform (controller) / Lint / Lint Terraform	9s
Run Tests / Terraform (ui) / Apply / Apply Terraform	5m 8s
Run Tests / Terraform (ui) / Check / Check Terraform	5s
Run Tests / Terraform (ui) / Lint / Lint Terraform	8s
Publish Charm / Publish Charm (./charms/jupyter-ui)	18m 19s
Publish Charm / Publish Charm (./charms/jupyter-controller)	18m 50s
	1h 57m 23s

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