docs: Update way that C++ standard is defined in example

Author: 2b-t

ReadMe.md

@@ -80,15 +80,17 @@ In your CMake package you can then find the package and link to it as follows:
 cmake_minimum_required(VERSION 3.20)
 project(your_project)
 
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED True)
-
 find_package(myactuator_rmd REQUIRED)
 
 add_executable(your_node
   src/main.cpp
 )
-target_link_libraries(your_node PUBLIC myactuator_rmd::myactuator_rmd)
+target_compile_features(your_node PUBLIC
+  cxx_std_17
+)
+target_link_libraries(your_node PUBLIC
+  myactuator_rmd::myactuator_rmd
+)
 ```
 
 A minimal example for the `main.cpp` can be found below: