docs:fixing broken links in readme (#11108)

Signed-off-by: Fiona Waters <fiwaters6@gmail.com>

README.md

@@ -17,22 +17,21 @@ The Kubeflow pipelines service has the following goals:
 
 ## Installation
 
-* Install Kubeflow Pipelines from choices described in [Installation Options for Kubeflow Pipelines](https://www.kubeflow.org/docs/pipelines/installation/overview/).
+* Kubeflow Pipelines can be installed as part of the [Kubeflow Platform](https://www.kubeflow.org/docs/started/installing-kubeflow/#kubeflow-platform). Alternatively you can deploy [Kubeflow Pipelines](https://www.kubeflow.org/docs/components/pipelines/operator-guides/installation/) as a standalone service.
 
-* The Docker container runtime has been deprecated on Kubernetes 1.20+. Kubeflow Pipelines has switched to use [Emissary Executor](https://www.kubeflow.org/docs/components/pipelines/installation/choose-executor/#emissary-executor) by default from Kubeflow Pipelines 1.8. Emissary executor is Container runtime agnostic, meaning you are able to run Kubeflow Pipelines on Kubernetes cluster with any [Container runtimes](https://kubernetes.io/docs/setup/production-environment/container-runtimes/). 
+
+* The Docker container runtime has been deprecated on Kubernetes 1.20+. Kubeflow Pipelines has switched to use [Emissary Executor](https://www.kubeflow.org/docs/components/pipelines/legacy-v1/installation/choose-executor/#emissary-executor) by default from Kubeflow Pipelines 1.8. Emissary executor is Container runtime agnostic, meaning you are able to run Kubeflow Pipelines on Kubernetes cluster with any [Container runtimes](https://kubernetes.io/docs/setup/production-environment/container-runtimes/). 
 
 ## Documentation
 
-Get started with your first pipeline and read further information in the [Kubeflow Pipelines overview](https://www.kubeflow.org/docs/components/pipelines/introduction/).
+Get started with your first pipeline and read further information in the [Kubeflow Pipelines overview](https://www.kubeflow.org/docs/components/pipelines/overview/).
 
-See the various ways you can [use the Kubeflow Pipelines SDK](https://www.kubeflow.org/docs/pipelines/sdk/sdk-overview/).
+See the various ways you can [use the Kubeflow Pipelines SDK](https://kubeflow-pipelines.readthedocs.io/en/stable/).
 
-See the Kubeflow [Pipelines API doc](https://www.kubeflow.org/docs/pipelines/reference/api/kubeflow-pipeline-api-spec/) for API specification.
+See the Kubeflow [Pipelines API doc](https://www.kubeflow.org/docs/components/pipelines/reference/api/kubeflow-pipeline-api-spec/) for API specification.
 
 Consult the [Python SDK reference docs](https://kubeflow-pipelines.readthedocs.io/en/stable/) when writing pipelines using the Python SDK.
 
-Refer to the [versioning policy](./docs/release/versioning-policy.md) and [feature stages](./docs/release/feature-stages.md) documentation for more information about how we manage versions and feature stages (such as Alpha, Beta, and Stable).
-
 ## Contributing to Kubeflow Pipelines
 
 Before you start contributing to Kubeflow Pipelines, read the guidelines in [How to Contribute](./CONTRIBUTING.md). To learn how to build and deploy Kubeflow Pipelines from source code, read the [developer guide](./developer_guide.md).