Update dependency kubernetes-sigs/kustomize to v5.8.1

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

Author: renovate[bot]

Dockerfile

@@ -41,7 +41,7 @@ RUN sed -i "s/^__git_version__.*$/__git_version__ = '${GITVERSION}'/" commodore/
 
 RUN pip install ./dist/syn_commodore-*-py3-none-any.whl
 
-ARG KUSTOMIZE_VERSION=5.8.0
+ARG KUSTOMIZE_VERSION=5.8.1
 ARG JSONNET_BUNDLER_VERSION=v0.6.3
 ARG HELM_VERSION=v4.1.1