[TXT2NLS] Use delete[] to deallocate new[] output (#4022)

Per AppleClang 13.0 warning.

sdk/tools/txt2nls/main.cpp

@@ -541,7 +541,7 @@ int main(int argc, char* argv[])
     output.write(reinterpret_cast<char*>(wc_table), 65536 * FileHeader.MaximumCharacterSize);
 
     output.close();
-    delete wc_table;
+    delete[] wc_table;
 
     return 0;
 }