Update registry.redhat.io/ubi9/go-toolset:9.6 Docker digest to 81d9cb5

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

Author: red-hat-konflux[bot]

Dockerfile.fulcio-server.rh

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM registry.redhat.io/ubi9/go-toolset:9.6@sha256:3f552f246b4bd5bdfb4da0812085d381d00d3625769baecaed58c2667d344e5c AS builder
+FROM registry.redhat.io/ubi9/go-toolset:9.6@sha256:81d9cb51feb0b56e3d87a73c2237bebaa80b28e4d5791c1da1140eae50225e2f AS builder
 
 ENV GOEXPERIMENT=strictfipsruntime
 ENV CGO_ENABLED=1