fix cmake error in minimize ubuntu 20.04 and vcpkg ci pipeline (#159)

CMakeLists.txt

@@ -8,6 +8,9 @@ project(yaLanTingLibs
 
 include_directories(include)
 
+#the thread library of the system.
+find_package(Threads REQUIRED)
+
 include(cmake/utils.cmake)
 include(cmake/struct_pb.cmake)
 include(cmake/build.cmake)

cmake/dependency.cmake

@@ -1,6 +1,3 @@
-#the thread library of the system.
-find_package(Threads REQUIRED)
-
 # 3rd-party package load
 option(USE_CONAN "Use conan package manager" OFF)
 if(USE_CONAN)