Demangle: Fix comment typos to cycle bots

NOKEYCHECK=True
GitOrigin-RevId: 9ae24fca2522c70eaff6c3e9c5ea89675db7c213
diff --git a/src/demangle/ItaniumDemangle.h b/src/demangle/ItaniumDemangle.h
index 2637d2d..ecc9b1a 100644
--- a/src/demangle/ItaniumDemangle.h
+++ b/src/demangle/ItaniumDemangle.h
@@ -3319,7 +3319,7 @@
     return nullptr;
 
   // We can't use lower_bound as that can link to symbols in the C++ library,
-  // and this must remain independant of that.
+  // and this must remain independent of that.
   size_t lower = 0u, upper = NumOps - 1; // Inclusive bounds.
   while (upper != lower) {
     size_t middle = (upper + lower) / 2;