release: update the broken link and add smoke test instructions

Signed-off-by: jiaxiao zhou <[email protected]>

Author: Mossaka

release.md

@@ -48,9 +48,22 @@ following:
     - The release action also creates test applications, a k3d node image with
       the `containerd-shim-spin`, and a new node installer image to be used by
       the runtime class manager.
+
+1. [Optional] Smoke test the release by running the following commands, replacing the version number with the new release:
+
+    ```console
+    k3d cluster create wasm-cluster \
+      --image ghcr.io/spinkube/containerd-shim-spin/k3d:v0.15.0 \
+      -p "8081:80@loadbalancer" \
+      --agents 2
+   kubectl apply -f https://github.com/spinkube/containerd-shim-spin/releases/download/v0.15.0/runtime.yaml
+   kubectl apply -f https://github.com/spinkube/containerd-shim-spin/releases/download/v0.15.0/workload.yaml
+    ```
+   
+This will create a k3d cluster with the new release and deploy a test workload to it.
   
 1. Update [SpinKube documentation](https://github.com/spinkube/documentation) as
    necessary. Ensure the latest [node installer
    image](https://www.spinkube.dev/docs/install/installing-with-helm/#prepare-the-cluster)
    is used and update the [Shim and Spin version
-   map](https://www.spinkube.dev/docs/reference/shim-spin-version-map/).
+   map](https://www.spinkube.dev/docs/install/compatibility-matrices/).