Merge pull request #88168 from max-cx/OBSDOCS-1608

OBSDOCS-1608: Update the span RED metrics namespace

Author: skopacz1

modules/distr-tracing-tempo-config-spanmetrics.adoc

@@ -96,11 +96,13 @@ spec:
         monitorTab:
           enabled: true # <1>
           prometheusEndpoint: https://thanos-querier.openshift-monitoring.svc.cluster.local:9091 # <2>
+          redMetricsNamespace: "" <3>
         ingress:
           type: route
 ----
 <1> Enables the monitoring tab in the Jaeger console.
 <2> The service name for Thanos Querier from user-workload monitoring.
+<3> Optional: The metrics namespace on which the Jaeger query retrieves the Prometheus metrics. Include this line only if you are using an OpenTelemetry Collector version earlier than 0.109.0. If you are using an OpenTelemetry Collector version 0.109.0 or later, omit this line.
 
 [id="distr-tracing-tempo-config-spanmetrics_span-red-metrics-and-alerting-rules_{context}"]
 == Span RED metrics and alerting rules