Fix typo in Grafana name in chapter09 documentation

microprofile/microprofile-marketing#1104 (comment)

Author: ttelang

modules/ROOT/pages/chapter09/index.adoc

@@ -532,7 +532,7 @@ Once trace data is collected and exported to a backend system, analyzing these t
 
 === Visualizing Traces
 
-Tracing backends like *Jaeger*, *Zipkin*, or *Graphana Tempo* provide visual interfaces to explore and analyze traces. These tools display traces as timelines or dependency graphs, making it easier to:
+Tracing backends like *Jaeger*, *Zipkin*, or *Grafana Tempo* provide visual interfaces to explore and analyze traces. These tools display traces as timelines or dependency graphs, making it easier to:
 
 * Understand the sequence of operations.
 * Identify the services and components involved in a request.