Update fluxcd/image-reflector-controller Docker tag to v0.7.0

This MR contains the following updates:

Package	Type	Update	Change
fluxcd/image-reflector-controller	ironbank-docker	minor	v0.6.0 -> v0.7.0
fluxcd/image-reflector-controller		minor	v0.6.0 -> v0.7.0
fluxcd/image-reflector-controller	stage	minor	v0.6.0 -> v0.7.0

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