Update ghcr.io/yannh/kubeconform Docker tag to v0.6.6

Author: renovate[bot]

.github/workflows/validate.yaml

@@ -40,12 +40,12 @@ jobs:
     - name: Kustomize Build
       run: kustomize build ${{ matrix.overlay }} > ${{ matrix.overlay }}/rendered.yaml
     - name: Run Kubeconform (Default Schemas)
-      uses: docker://ghcr.io/yannh/kubeconform:v0.6.1
+      uses: docker://ghcr.io/yannh/kubeconform:v0.6.6
       with:
         entrypoint: '/kubeconform'
         args: "-strict -ignore-missing-schemas -schema-location default -summary ${{ matrix.overlay }}/rendered.yaml"
     - name: Run Kubeconform (CRDs)
-      uses: docker://ghcr.io/yannh/kubeconform:v0.6.1
+      uses: docker://ghcr.io/yannh/kubeconform:v0.6.6
       with:
         entrypoint: '/kubeconform'
         args: "-strict -ignore-missing-schemas -schema-location 'https://raw.githubusercontent.com/datreeio/CRDs-catalog/main/{{.Group}}/{{.ResourceKind}}_{{.ResourceAPIVersion}}.json' -summary ${{ matrix.overlay }}/rendered.yaml"