Fixed docs helm-docs version (kubernetes#9121)

RELEASE.md

@@ -233,7 +233,7 @@ Promoting the images basically means that images, that were pushed to staging co
 
   - [helm-docs](https://github.com/norwoodj/helm-docs) is a tool that generates the README.md for a helm-chart automatically. In the CI pipeline workflow of github actions (/.github/workflows/ci.yaml), you can see how helm-docs is used. But the CI pipeline is not designed to make commits back into the project. So we need to run helm-docs manually, and check in the resulting autogenerated README.md at the path /charts/ingress-nginx/README.md 
     ```
-          GOBIN=$PWD GO111MODULE=on go install github.com/norwoodj/helm-docs/cmd/helm-docs@v1.6.0
+          GOBIN=$PWD GO111MODULE=on go install github.com/norwoodj/helm-docs/cmd/helm-docs@v1.11.0
           ./helm-docs --chart-search-root=${GITHUB_WORKSPACE}/charts
           git diff --exit-code
           rm -f ./helm-docs