chore(deps): update dependency crossplane/crossplane to v1.15.2

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Makefile

@@ -22,7 +22,7 @@ KUBE_CURRENT_CONTEXT = $(shell kubectl config current-context)
 CLUSTER = $(CLUSTER_$(ENV))
 
 # datasource=github-tags depName=crossplane/crossplane
-CROSSPLANE_VERSION = v1.15.1
+CROSSPLANE_VERSION = v1.15.2
 CROSSPLANE_NAMESPACE = crossplane-system
 
 ACK_SYSTEM_NAMESPACE = ack-system