Update base image to python-3.11.3 #317

Job	Run time
build-amd64 / linux/amd64	3m 32s
test-amd64 (full-stack) / full-stack	5m 44s
test-amd64 (base) / base	5m 29s
test-amd64 (lab) / lab	1m 52s
test-amd64 (base-with-services) / base-with-services	7m 3s
build / linux/amd64,linux/arm64	12m 8s
test-arm64 / full-stack	7m 55s
publish-ghcr / release (base)	6s
publish-ghcr / release (base-with-services)	14s
publish-ghcr / release (lab)	8s
publish-ghcr / release (full-stack)	8s
Integration tests (ubuntu-22.04, true) / ubuntu-22.04	2m 38s
Integration tests (buildjet-4vcpu-ubuntu-2204-arm, true) / buildjet-4vcpu-ubuntu-2204-arm	11m 54s
publish-dockerhub	0s
make-release	0s
	58m 51s

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