fix(deps): update dependency skopeo to v1.18.0

| datasource      | package                  | from   | to     |
| --------------- | ------------------------ | ------ | ------ |
| github-releases | visualon/skopeo-prebuild | 1.17.0 | 1.18.0 |

Author: renovate[bot]

linux/Dockerfile

@@ -50,7 +50,7 @@ RUN install-tool buildx v0.20.1
 RUN install-tool kustomize 5.6.0
 
 # renovate: datasource=github-releases packageName=visualon/skopeo-prebuild
-RUN install-tool skopeo 1.17.0
+RUN install-tool skopeo 1.18.0
 
 # renovate: datasource=java-version packageName=java-jre
 RUN install-tool java 21.0.6+7.0.LTS