Help: Fix typo in cmake-compile-features(7) manual (#15594)

target_link_libraries() is being used in the example code but
target_include_directories() was probably meant to be used. The sentence
that starts with "Consuming code then" indicates that the example is
about using the appropriate include directory.

Help/manual/cmake-compile-features.7.rst

@@ -278,7 +278,7 @@ properties:
   add_library(foo INTERFACE)
   set(with_variadics ${CMAKE_CURRENT_SOURCE_DIR}/with_variadics)
   set(no_variadics ${CMAKE_CURRENT_SOURCE_DIR}/no_variadics)
-  target_link_libraries(foo
+  target_include_directories(foo
     INTERFACE
       "$<$<COMPILE_FEATURES:cxx_variadic_templates>:${with_variadics}>"
       "$<$<NOT:$<COMPILE_FEATURES:cxx_variadic_templates>>:${no_variadics}>"