[feat]; link non-http modules to metric reference

Author: MattDodsonEnglish

src/data/markdown/docs/02 javascript api/07 k6-experimental/05 websockets.md

@@ -39,6 +39,11 @@ A WebSocket instance also has the following properties:
 | [WebSocket.onpong](/javascript-api/k6-experimental/websockets/websocket/websocket-onpong) | A handler for `pong` events. |
 <!-- vale on -->
 
+## Websocket metrics
+
+k6 takes specific measurements for Websockets.
+For the complete list, refer to the [Metrics reference](/using-k6/metrics/reference).
+
 ## Example
 
 This example shows:

src/data/markdown/docs/02 javascript api/11 k6-net-grpc.md

@@ -22,6 +22,11 @@ The k6 gRPC API is currently considered in beta and is subject to change. Future
 | [Response](/javascript-api/k6-net-grpc/response) | Returned by RPC requests. |
 | [Constants](/javascript-api/k6-net-grpc/constants) | Define constants to distinguish between [gRPC Response](/javascript-api/k6-net-grpc/response) statuses. |
 
+## gRPC metrics
+
+k6 takes specific measurements for gRPC requests.
+For the complete list, refer to the [Metrics reference](/using-k6/metrics/reference).
+
 ### Example
 
 <CodeGroup labels={["grpc-test.js"]}>