[Docs][KubeRay] Fix broken Istio Jaeger dashboard link

Closes: #47239
Signed-off-by: Chi-Sheng Liu <[email protected]>

doc/source/cluster/kubernetes/k8s-ecosystem/istio.md

@@ -310,7 +310,8 @@ Run the following command to start the Jaeger dashboard:
 istioctl dashboard jaeger
 ```
 
-Go to the Jaeger dashboard with the `service=raycluster-istio.default` query: [http://localhost:16686/jaeger/search?limit=1000&lookback=1h&maxDuration&minDuration&service=raycluster-istio.default](http://localhost:16686/jaeger/search?limit=1000&lookback=1h&maxDuration&minDuration&service=raycluster-istio.default)
+<!-- TODO: Change the following link to markdown syntax after this issue  https://github.com/executablebooks/MyST-Parser/issues/760 is resolved -->
+Go to the Jaeger dashboard with the `service=raycluster-istio.default` query: <a class="reference external" href="http://localhost:16686/jaeger/search?limit=1000&lookback=1h&maxDuration&minDuration&service=raycluster-istio.default">http://localhost:16686/jaeger/search?limit=1000&lookback=1h&maxDuration&minDuration&service=raycluster-istio.default</a>
 
 ![Istio Jaeger Overview](../images/istio-jaeger-1.png)
 
@@ -324,4 +325,4 @@ Run the following command to delete your cluster.
 
 ```bash
 kind delete cluster
-```
+```