Help: Fix order of help entries.

Help/manual/cmake-properties.7.rst

@@ -108,8 +108,8 @@ Properties on Targets
    /prop_tgt/COMPILE_PDB_OUTPUT_DIRECTORY_CONFIG
    /prop_tgt/CONFIG_OUTPUT_NAME
    /prop_tgt/CONFIG_POSTFIX
-   /prop_tgt/CXX_STANDARD
    /prop_tgt/CXX_EXTENSIONS
+   /prop_tgt/CXX_STANDARD
    /prop_tgt/DEBUG_POSTFIX
    /prop_tgt/DEFINE_SYMBOL
    /prop_tgt/EchoString

Help/manual/cmake-variables.7.rst

@@ -258,8 +258,8 @@ Variables for Languages
 
    /variable/CMAKE_COMPILER_IS_GNULANG
    /variable/CMAKE_CXX_COMPILE_FEATURES
-   /variable/CMAKE_CXX_STANDARD
    /variable/CMAKE_CXX_EXTENSIONS
+   /variable/CMAKE_CXX_STANDARD
    /variable/CMAKE_Fortran_MODDIR_DEFAULT
    /variable/CMAKE_Fortran_MODDIR_FLAG
    /variable/CMAKE_Fortran_MODOUT_FLAG