Remove observability for internal resources

docs/content/observability/tracing/overview.md

@@ -14,10 +14,8 @@ Traefik uses [OpenTelemetry](https://opentelemetry.io/ "Link to website of OTel"
 
 Please check our dedicated [OTel docs](./opentelemetry.md) to learn more.
 
-
 ## Configuration
 
-
 To enable the tracing:
 
 ```yaml tab="File (YAML)"
@@ -34,6 +32,26 @@ tracing: {}
 
 ### Common Options
 
+#### `addInternals`
+
+_Optional, Default="false"_
+
+Enables tracing for internal resources.
+
+```yaml tab="File (YAML)"
+tracing:
+  addInternals: true
+```
+
+```toml tab="File (TOML)"
+[tracing]
+  addInternals = true
+```
+
+```bash tab="CLI"
+--tracing.addinternals
+```
+
 #### `serviceName`
 
 _Required, Default="traefik"_