fix(deps): update registry.gitlab.developers.cam.ac.uk/uis/devops/lib/ucam-faas-python:0.16.0 docker digest to af5b076

This MR contains the following updates:

Package	Type	Update	Change
registry.gitlab.developers.cam.ac.uk/uis/devops/lib/ucam-faas-python	final	digest	4dd641d -> af5b076

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