[libc] [obvious] Fix typographical error.

GitOrigin-RevId: d28f67292e04bde4b91146c342d27f989eeb5020
diff --git a/benchmarks/LibcBenchmark.h b/benchmarks/LibcBenchmark.h
index 46db9a1..e2d01dc 100644
--- a/benchmarks/LibcBenchmark.h
+++ b/benchmarks/LibcBenchmark.h
@@ -69,7 +69,7 @@
   uint32_t MinSamples = 4;
   // The maximum number of samples.
   uint32_t MaxSamples = 1000;
-  // The benchmark will stop is the relative difference between the current and
+  // The benchmark will stop if the relative difference between the current and
   // the last estimation is less than epsilon. This is 1% by default.
   double Epsilon = 0.01;
   // The number of iterations grows exponentially between each sample.