Update quay.io/skupper/skupper-router Docker tag to v2.5.2

This MR contains the following updates:

Package	Type	Update	Change
quay.io/skupper/skupper-router		patch	2.5.1 -> 2.5.2
quay.io/skupper/skupper-router	ironbank-docker	patch	2.5.1 -> 2.5.2
quay.io/skupper/skupper-router	stage	patch	2.5.1 -> 2.5.2

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