Update k8s.gcr.io/kube-proxy Docker tag to v1.19.14

This MR contains the following updates:

Package	Type	Update	Change
k8s.gcr.io/kube-proxy	ironbank-docker	patch	v1.19.13 -> v1.19.14
k8s.gcr.io/kube-proxy		patch	v1.19.13 -> v1.19.14
k8s.gcr.io/kube-proxy	stage	patch	v1.19.13 -> v1.19.14

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