Update deploy-hybrid.mdx (#1268)

Fix wrong Helm repo

## Overview
Update wrong Helm repo on doc.

## Type of change

**Type:** Update existing documentation

Author: KrustyHack

src/langsmith/deploy-hybrid.mdx

@@ -74,7 +74,7 @@ The following steps describe how to connect your self-hosted data plane to the m
     - `operator.createCRDs`: Set this value to `false` if the Kubernetes cluster already has the `LangGraphPlatform CRD` installed. During installation, an error will occur if the CRD is already installed. This situation may occur if multiple listeners are deployed on the same Kubernetes cluster.
 5. Deploy `langgraph-dataplane` Helm chart.
     ```bash
-      helm repo add langchain https://github.com/langchain-ai/helm
+      helm repo add langchain https://langchain-ai.github.io/helm/
       helm repo update
       helm upgrade -i langgraph-dataplane langchain/langgraph-dataplane --values langgraph-dataplane-values.yaml --wait --debug
     ```