README.md: fix Kubernetes min version

When upgrading knative/pkg to 1.14, the update on the README was
wrongly done, so this is fixing it.

Signed-off-by: Vincent Demeester <vdemeest@redhat.com>

README.md

@@ -43,7 +43,8 @@ Tekton Pipelines are **Typed**:
 - Starting from the v0.41.x release of Tekton: **Kubernetes version 1.23 or later**
 - Starting from the v0.45.x release of Tekton: **Kubernetes version 1.24 or later**
 - Starting from the v0.51.x release of Tekton: **Kubernetes version 1.25 or later**
-- Starting from the v0.59.x release of Tekton: **Kubernetes version 1.28 or later**
+- Starting from the v0.59.x release of Tekton: **Kubernetes version 1.27 or later**
+- Starting from the v0.61.x release of Tekton: **Kubernetes version 1.28 or later**
 
 ### Read the docs