chore(deps): update module sigs.k8s.io/structured-merge-diff/v4 to v6

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

go.mod

@@ -7,6 +7,7 @@ toolchain go1.24.6
 require (
 	github.com/go-logr/logr v1.4.3
 	github.com/h2non/gock v1.2.0
+	github.com/konflux-ci/coverport/instrumentation/go v0.0.0-20251127103713-95b5b5e04a62
 	github.com/onsi/ginkgo/v2 v2.26.0
 	github.com/onsi/gomega v1.38.2
 	github.com/prometheus/client_golang v1.19.1
@@ -56,7 +57,6 @@ require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/konflux-ci/coverport/instrumentation/go v0.0.0-20251127103713-95b5b5e04a62 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect