Renaming branches: handling operator repository

Changing links to any reference to tektoncd/operator.

Signed-off-by: Vincent Demeester <[email protected]>

content/en/docs/Overview/_index.md

@@ -65,7 +65,7 @@ Tekton consists of the following components:
 
 - **[Tekton Hub](https://github.com/tektoncd/hub/blob/master/README.md)** is a Web-based graphical interface for accessing the Tekton Catalog.
 
-- **[Tekton Operator](https://github.com/tektoncd/operator/blob/master/README.md)** is a Kubernetes [Operator pattern](https://operatorhub.io/what-is-an-operator)
+- **[Tekton Operator](https://github.com/tektoncd/operator/blob/main/README.md)** is a Kubernetes [Operator pattern](https://operatorhub.io/what-is-an-operator)
   that allows you to install, update, and remove Tekton projects on your Kubernetes cluster.