dummy test to validate updated ci (#539)

disable ci/action ubuntu as it's redundant with the matrix runs

test_main/test_main.cpp

@@ -10,6 +10,6 @@
 int main(int argc, char* argv[]) {
    testing::InitGoogleTest(&argc, argv);
    int return_value = RUN_ALL_TESTS();
-   std::cout << "FINISHED WITH THE TESTING" << std::endl;
+   std::cout << "FINISHED WITH THE TESTING " << std::endl;
    return return_value;
 }