[libc][Obvious] Fix typo is wrappergen unittest.

GitOrigin-RevId: e1a5b234ef94adb87fdf01371a672053c0d814a7
diff --git a/test/utils/tools/WrapperGen/wrappergen_test.cpp b/test/utils/tools/WrapperGen/wrappergen_test.cpp
index 923b318..c4f64a0 100644
--- a/test/utils/tools/WrapperGen/wrappergen_test.cpp
+++ b/test/utils/tools/WrapperGen/wrappergen_test.cpp
@@ -238,7 +238,7 @@
 
   ASSERT_EQ(STDErrOutput,
             "error: The options 'mangled-name' and 'mangled-name-file' "
-            "cannot be specified simultaniously.\n");
+            "cannot be specified simultaneously.\n");
 
   auto STDOutOrError = llvm::MemoryBuffer::getFile(STDOutFile.get().TmpName);
   std::string STDOutOutput = STDOutOrError.get()->getBuffer().str();