rename test file

CMakeLists.txt

@@ -237,19 +237,19 @@ target_link_libraries(
 )
 
 add_executable(
-  mytest
+  ut
 
-  test/mytest.cpp
+  test/ut.cpp
 )
 
 target_link_libraries(
-  mytest
+  ut
   gtest
   gtest_main
   pqclean_s)
 
 target_include_directories(
-  mytest PRIVATE
+  ut PRIVATE
 
   ${CMAKE_SOURCE_DIR})