chore(deps): update registry.redhat.io/ubi9/go-toolset:9.7 docker digest to e421039

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

Author: red-hat-konflux[bot]

Dockerfile.cosign.rh

@@ -1,6 +1,6 @@
 # Build stage
 
-FROM registry.redhat.io/ubi9/go-toolset:9.7@sha256:b3b98e0b21ddbb979d968ca319b8eebdca121e30d58994072cbf99ce86e5d24e AS build-env
+FROM registry.redhat.io/ubi9/go-toolset:9.7@sha256:e4210398439060b5e7bbea2dc5ee532b3b85911e64924c3a81a645553c2ab240 AS build-env
 
 ENV GOEXPERIMENT=strictfipsruntime
 ENV CGO_ENABLED=1