Report the actual error

Tools/KanimajiTool/Main.cpp

@@ -16,7 +16,7 @@ int main(const int argc, const char *argv[])
         Kanimaji::AnimateFile(argv[1], argv[2]);
     }
     catch (const std::exception& e) {
-        std::println("Could not animate {}: {}", argv[1], argv[2]);
+        std::println("Could not animate {}: {}", argv[1], e.what());
         return 1;
     }