Fix comment for MinidumpUTF8StringAtRVAAsString()

minidump/test/minidump_string_writer_test_util.h

Index: minidump/test/minidump_string_writer_test_util.h
diff --git a/minidump/test/minidump_string_writer_test_util.h b/minidump/test/minidump_string_writer_test_util.h
index 9910a3dcb23c95678b6fc9d44b0ef04a232e4b5d..2749214266c6d5a26aa621247b610b4570118e09 100644
--- a/minidump/test/minidump_string_writer_test_util.h
+++ b/minidump/test/minidump_string_writer_test_util.h
@@ -82,8 +82,8 @@ string16 MinidumpStringAtRVAAsString(const std::string& file_contents, RVA rva);
 
 //! \brief Returns the contents of a MinidumpUTF8String as a `std::string`.
 //!
-//! This function uses MinidumpUTF16StringAtRVA() to obtain a
-//! MinidumpUTF16String, and returns the string data as a `std::string`.
+//! This function uses MinidumpUTF8StringAtRVA() to obtain a MinidumpUTF8String,
+//! and returns the string data as a `std::string`.
 //!
 //! \param[in] file_contents The contents of the minidump file.
 //! \param[in] rva The offset within the minidump file of the desired