fix: calibration wss url

The url wasn't working. I tried this one instead and it worked.

#### Test plan
```sh
wscat -c wss://wss.calibration.node.glif.io/apigw/lotus/rpc/v1
```

Author: wjmelements

content/en/lotus/developers/glif-nodes.md

@@ -35,7 +35,7 @@ Calibration nodes using the [JSON RPC API]({{< relref "../../reference/basics/ap
 You can use the `v1` JSON RPC API with `https://api.calibration.node.glif.io/rpc/v1`
 {{< /alert >}}
 
-- The Calibration network has a WebSocket endpoint. The WebSocket link is available at wss://wss.calibration.node.glif.io/apigw/lotus/rpc/1
+- The Calibration network has a WebSocket endpoint. The WebSocket link is available at wss://wss.calibration.node.glif.io/apigw/lotus/rpc/v1
 
 ### Custom endpoints