fix English typo
In post Shakespearian English, it's != its
@@ -16,7 +16,7 @@ Kubernetes.
## Virtualization extension for Kubernetes
-At it's core KubeVirt extends [Kubernetes][k8s] by adding
+At its core, KubeVirt extends [Kubernetes][k8s] by adding
additional virtualization resource types (especially the `VM` type) through
[Kubernetes's third party resource concept][tpr].
By using this mechanism, the Kubernetes API can be used to manage these `VM`
