Add link to API in Kubernetes

content/en/kubernetes.md

@@ -9,7 +9,7 @@ Kubernetes, often abbreviated as K8s, is a popular open-source tool for modern i
 
 Kubernetes schedules [containers](/container/) across [nodes](/nodes/) in a [cluster](/cluster/). It bundles several infrastructure constructs, sometimes referred to as “primitives,” like an instance of an app, load balancers, persistent storage, and others together in a way that they can be composed into applications. 
 
-Kubernetes enables automation and extensibility, allowing users to deploy applications declaratively in a reproducible way. Software products and projects in the Kubernetes ecosystem take advantage of that automation and extensibility to extend the Kubernetes API. This enables them to leverage Kubernetes’ automation and make their tools more accessible to experienced Kubernetes practitioners.
+Kubernetes enables automation and extensibility, allowing users to deploy applications declaratively in a reproducible way. Software products and projects in the Kubernetes ecosystem take advantage of that automation and extensibility to extend the Kubernetes [API](/application_programming_interface/). This enables them to leverage Kubernetes’ automation and make their tools more accessible to experienced Kubernetes practitioners.
 
 ## Problem it addresses
 Infrastructure automation and declarative configuration management have been important concepts for a long time and have only become more pressing as [cloud computing](/cloud_computing/) has gained popularity. As demand for compute resources increases and organizations feel pressured to provide more operational capabilities with fewer engineers, new technologies and working methods are required to meet that demand. Additionally, the rise of cloud computing was paired with [containerization](/containerization/) and organizations that were busy automating more traditional infrastructure needed a mechanism to automate the configuration and deployment of their containers.