Update azure-vpn-gateway.mdx (cloudflare#21059)

Update connection mode to InitiatorOnly

Author: jmanzanoCF

src/content/docs/magic-wan/configuration/manually/third-party/azure/azure-vpn-gateway.mdx

@@ -148,7 +148,7 @@ Choose the following settings when creating your VPN Connection:
    4. **IPsec SA lifetime in seconds**: `28800`
    5. **Use policy based traffic selector**: **Disable**
    6. **DPD timeout in seconds**: `45`
-   7. **Connection mode**: **Default**
+   7. **Connection mode**: **InitiatorOnly**
    8. **Use custom traffic selectors**: **Disabled**
 6. After the connection is created, select **Settings** > **Authentication**, and input your PSK (this will need to match the PSK used by the Magic WAN configuration).