doc: minor wording improvement to the diagnostics guide

Change-Id: I8469fbbb934f096f04ad68c592aacdb805b6d2d4
GitHub-Last-Rev: 6d2cfcc
GitHub-Pull-Request: #23754
Reviewed-on: https://go-review.googlesource.com/92996
Reviewed-by: Andrew Bonventre <[email protected]>

Author: rakyll

doc/diagnostics.html

@@ -222,7 +222,7 @@ <h2 id="tracing">Tracing</h2>
 <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>