docs: improve clarity in observability definition (#9530)

Co-authored-by: Fabrizio Ferri-Benedetti <algernon@fastmail.com>

Author: sbarcoe90

content/en/docs/what-is-opentelemetry.md

@@ -37,9 +37,10 @@ For more videos in this series and additional resources, see
 ## What is observability?
 
 [Observability][] is the ability to understand the internal state of a system by
-examining its outputs. In the context of software, this means being able to
-understand the internal state of a system by examining its telemetry data, which
-includes traces, metrics, and logs.
+examining its outputs.
+
+In software, this is typically achieved by analyzing telemetry data such as
+traces, metrics, and logs.
 
 To make a system observable, it must be [instrumented][instr]. That is, the code
 must emit [traces][], [metrics][], or [logs][]. The instrumented data must then