docs: added internal load balancer service annotations for Oracle Cloud

Reviewed-by: Avi Miller <[email protected]>
Signed-off-by: Ali Mukadam <[email protected]>

Author: hyder

content/en/docs/concepts/services-networking/service.md

@@ -859,6 +859,17 @@ metadata:
 [...]
 ```
 
+{{% /tab %}}
+{{% tab name="OCI" %}}
+
+```yaml
+[...]
+metadata:
+    name: my-service
+    annotations:
+        service.beta.kubernetes.io/oci-load-balancer-internal: true
+[...]
+```
 {{% /tab %}}
 {{< /tabs >}}