Help: Fix toctree order of Xcode scheme variable and property

In commit 92c4c852db (Xcode: Add custom working directory property,
2019-11-18, v3.17.0-rc1~400^2) the toctree links to the new properties
were not added in sorted order.  Move them.

Issue: #20439

Help/manual/cmake-properties.7.rst

@@ -389,7 +389,6 @@ Properties on Targets
    /prop_tgt/XCODE_SCHEME_ADDRESS_SANITIZER
    /prop_tgt/XCODE_SCHEME_ADDRESS_SANITIZER_USE_AFTER_RETURN
    /prop_tgt/XCODE_SCHEME_ARGUMENTS
-   /prop_tgt/XCODE_SCHEME_WORKING_DIRECTORY
    /prop_tgt/XCODE_SCHEME_DEBUG_AS_ROOT
    /prop_tgt/XCODE_SCHEME_DEBUG_DOCUMENT_VERSIONING
    /prop_tgt/XCODE_SCHEME_DISABLE_MAIN_THREAD_CHECKER
@@ -406,6 +405,7 @@ Properties on Targets
    /prop_tgt/XCODE_SCHEME_THREAD_SANITIZER_STOP
    /prop_tgt/XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER
    /prop_tgt/XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER_STOP
+   /prop_tgt/XCODE_SCHEME_WORKING_DIRECTORY
    /prop_tgt/XCODE_SCHEME_ZOMBIE_OBJECTS
    /prop_tgt/XCTEST
 

Help/manual/cmake-variables.7.rst

@@ -247,7 +247,6 @@ Variables that Change Behavior
    /variable/CMAKE_XCODE_GENERATE_TOP_LEVEL_PROJECT_ONLY
    /variable/CMAKE_XCODE_SCHEME_ADDRESS_SANITIZER
    /variable/CMAKE_XCODE_SCHEME_ADDRESS_SANITIZER_USE_AFTER_RETURN
-   /variable/CMAKE_XCODE_SCHEME_WORKING_DIRECTORY
    /variable/CMAKE_XCODE_SCHEME_DEBUG_DOCUMENT_VERSIONING
    /variable/CMAKE_XCODE_SCHEME_DISABLE_MAIN_THREAD_CHECKER
    /variable/CMAKE_XCODE_SCHEME_DYNAMIC_LIBRARY_LOADS
@@ -262,6 +261,7 @@ Variables that Change Behavior
    /variable/CMAKE_XCODE_SCHEME_THREAD_SANITIZER_STOP
    /variable/CMAKE_XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER
    /variable/CMAKE_XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER_STOP
+   /variable/CMAKE_XCODE_SCHEME_WORKING_DIRECTORY
    /variable/CMAKE_XCODE_SCHEME_ZOMBIE_OBJECTS
    /variable/PackageName_ROOT