Merge pull request #2528 from splunk/urbiz-OD6544-ngnix-metrics

[6544]: NGINX rx missing metrics

Author: aurbiztondo-splunk

gdi/opentelemetry/components/nginx-receiver.rst

@@ -103,7 +103,7 @@ The following metrics, resource attributes, and attributes are available.
 
    <div class="metrics-component" category="included" url="https://raw.githubusercontent.com/splunk/collector-config-tools/main/metric-metadata/nginxreceiver.yaml"></div>
 
-
+.. caution:: By default the NGINX receiver doesn't provide the following metrics: ``nginx_connections.reading``, ``nginx_connections.waiting``, and ``nginx_connections.writing``.
 
 .. raw:: html