minor text adjustment

doc/index.html

@@ -24,7 +24,7 @@ <h2>Description</h2>
 <b><em>-qdebug=function_trace</em></b> (AIX) 
 to the compile and link flags of the source files to be profiled. In order to get correct behavior
 from the auto-profiling feature, often it is necessary to add the <b>-rdynamic</b> link flag to
-their application being profiled. Otherwise profiled function names may be reported only as
+the application being profiled. Otherwise profiled function names may be reported only as
 addresses, which is not very useful.
 <p>
 Automatic instrumentation of a number of MPI routines is also possible, utilizing the PMPI