[docs] Update troubleshooting arguments (#4926)

* [docs] Update troubleshooting arguments

Update troubleshooting to use correct command line option to change metrics address

* update doc with before/after config

docs/troubleshooting.md

@@ -30,17 +30,30 @@ service:
 
 ### Metrics
 
-Prometheus metrics are exposed locally on port `8888` and path `/metrics`.
+Prometheus metrics are exposed locally on port `8888` and path `/metrics`. For
+containerized environments it may be desirable to expose this port on a
+public interface instead of just locally.
 
-For containerized environments it may be desirable to expose this port on a
-public interface instead of just locally. The metrics address can be configured
-by passing the `--metrics-addr` flag to the `otelcol` process. See `--help` for
+#### Version 0.42.0 and below:
+
+Pass `--metrics-addr <ADDR>` flag to the `otelcol` process. See `--help` for
 more details.
 
 ```bash
 $ otelcol --metrics-addr 0.0.0.0:8888
 ```
 
+#### Version 0.43.0 and above:
+Set the address in the config `service::telemetry::metrics`
+
+```yaml
+service:
+  telemetry:
+    metrics:
+      address: ":8888"
+```
+
+
 A grafana dashboard for these metrics can be found
 [here](https://grafana.com/grafana/dashboards/11575).