Update reference-docs repo (#16622)

reference-docs moved from kubernetes-incubator to kubernetes-sigs

Signed-off-by: Aimee Ukasick <aimeeu.opensource@gmail.com>

content/en/docs/contribute/generate-ref-docs/kubernetes-api.md

@@ -8,7 +8,7 @@ content_template: templates/task
 This page shows how to update the generated reference docs for the Kubernetes API.
 The Kubernetes API reference documentation is built from the
 [Kubernetes OpenAPI spec](https://github.com/kubernetes/kubernetes/blob/master/api/openapi-spec/swagger.json)
-and tools from [kubernetes-incubator/reference-docs](https://github.com/kubernetes-incubator/reference-docs).
+and tools from [kubernetes-sigs/reference-docs](https://github.com/kubernetes-sigs/reference-docs).
 
 If you find bugs in the generated documentation, you need to
 [fix them upstream](/docs/contribute/generate-ref-docs/contribute-upstream/).
@@ -50,7 +50,7 @@ export GOPATH=$HOME/<workspace>
 Get a local clone of the following repositories:
 
 ```shell
-go get -u github.com/kubernetes-incubator/reference-docs
+go get -u github.com/kubernetes-sigs/reference-docs
 
 go get -u github.com/go-openapi/loads
 go get -u github.com/go-openapi/spec
@@ -79,8 +79,8 @@ The remaining steps refer to your base directory as `<k8s-base>`.
 The remaining steps refer to your base directory as `<web-base>`.
 
 * The base directory of your clone of the
-[kubernetes-incubator/reference-docs](https://github.com/kubernetes-incubator/reference-docs)
-repository is `$GOPATH/src/github.com/kubernetes-incubator/reference-docs.`
+[kubernetes-sigs/reference-docs](https://github.com/kubernetes-sigs/reference-docs)
+repository is `$GOPATH/src/github.com/kubernetes-sigs/reference-docs.`
 The remaining steps refer to your base directory as `<rdocs-base>`.
 
 
@@ -183,7 +183,7 @@ static/docs/reference/generated/kubernetes-api/v1.15/scroll.js
 ## Updating the API reference index pages
 
 
-* Open `<web-base>/content/en/docs/reference/kubernetes-api/index.md` for editing, and update the API reference 
+* Open `<web-base>/content/en/docs/reference/kubernetes-api/index.md` for editing, and update the API reference
   version number. For example:
 
     ```
@@ -227,4 +227,4 @@ to monitor your pull request until it has been merged.
 * [Generating Reference Documentation for kubectl Commands](/docs/home/contribute/generated-reference/kubectl/)
 * [Generating Reference Documentation for the Kubernetes Federation API](/docs/home/contribute/generated-reference/federation-api/)
 
-{{% /capture %}}
+{{% /capture %}}