Update calico/ctl Docker tag to v3.28.1

This MR contains the following updates:

Package	Type	Update	Change
calico/ctl		patch	v3.28.0 -> v3.28.1
calico/ctl	ironbank-docker	patch	v3.28.0 -> v3.28.1
calico/ctl	stage	patch	v3.28.0 -> v3.28.1

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