chore(deps): update registry.access.redhat.com/ubi9/go-toolset docker tag to v1.25.8-1775724628

Signed-off-by: red-hat-konflux-kflux-prd-rh02 <190377777+red-hat-konflux-kflux-prd-rh02[bot]@users.noreply.github.com>

Author: red-hat-konflux-kflux-prd-rh02[bot]

.konflux/dockerfiles/tkn.Dockerfile

@@ -1,5 +1,5 @@
 # Rebuild trigger: 1.15.4 release 2026-02-27
-ARG GO_BUILDER=registry.access.redhat.com/ubi9/go-toolset:1.25
+ARG GO_BUILDER=registry.access.redhat.com/ubi9/go-toolset:1.25.8-1775724628
 ARG RUNTIME=registry.redhat.io/ubi8/ubi@sha256:a9bd8791589bee5bc0f9444fc37bdf7e8fabb8edf1d3f71dd673d31688c10950
 ARG PAC_BUILDER=registry.redhat.io/openshift-pipelines/pipelines-pipelines-as-code-cli-rhel8@sha256:c3c8fcadb15bed1134934a603264cdab044a356102c5330c0f2923c5588c71ef