doc: minor wording improvement to the diagnostics guide

Change-Id: I8469fbbb934f096f04ad68c592aacdb805b6d2d4
GitHub-Last-Rev: 6d2cfcc23d0d8e6a1b6ca383dae51f0cada2e1b3
GitHub-Pull-Request: golang/go#23754
Reviewed-on: https://go-review.googlesource.com/92996Reviewed-by: Andrew Bonventre <andybons@golang.org>

doc/diagnostics.html

@@ -222,7 +222,7 @@ an execution tracer to trace the runtime events within an interval.
 <p>Tracing enables us to:</p>
 
 <ul>
-<li>Instrument and profile application latency in a Go process.</li>
+<li>Instrument and analyze application latency in a Go process.</li>
 <li>Measure the cost of specific calls in a long chain of calls.</li>
 <li>Figure out the utilization and performance improvements.
 Bottlenecks are not always obvious without tracing data.</li>