Documented benchmark-resolution-multiple command line option

- and increased default to 100

include/internal/catch_config.hpp

@@ -39,7 +39,7 @@ namespace Catch {
 
         int abortAfter = -1;
         unsigned int rngSeed = 0;
-        int benchmarkResolutionMultiple = 10;
+        int benchmarkResolutionMultiple = 100;
 
         Verbosity verbosity = Verbosity::Normal;
         WarnAbout::What warnings = WarnAbout::Nothing;