docs: fixed a minor typo in k8s operator docs (#4113)

content/en/docs/kubernetes/operator/automatic.md

@@ -205,7 +205,7 @@ EOF
 ```
 
 By default, the Instrumentation resource that auto-instruments Java services
-uses `otlp` with the `http+protobuf` protocol. This means that the configured
+uses `otlp` with the `http/protobuf` protocol. This means that the configured
 endpoint must be able to receive OTLP over `http` via `protobuf` payloads.
 Therefore, the example uses `http://demo-collector:4318`, which connects to the
 `http` port of the otlpreceiver of the Collector created in the previous step.