Update quay.io/jetstack/cert-manager-ingress-shim Docker tag to v0.2.5

This MR contains the following updates:

Package	Type	Update	Change
quay.io/jetstack/cert-manager-ingress-shim	ironbank-docker	patch	v0.2.4 -> v0.2.5
quay.io/jetstack/cert-manager-ingress-shim	stage	patch	v0.2.4 -> v0.2.5

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