doc: create_application: fix freestanding app desc

Updated one line in the freestanding application description.
The line became incorrect with the recent changes in the IDE.
The new line is reused from the adding_code.rst and more accurate.
Reported by @kylebonnici.

Signed-off-by: Grzegorz Ferenc <[email protected]>

Author: greg-fer

doc/nrf/app_dev/create_application.rst

@@ -111,8 +111,7 @@ Freestanding application
 
 This kind of application is handled separately from the |NCS|.
 It is located out-of-tree, that is outside of a west workspace, and is not using the `west manifest file`_ to specify the SDK version.
-Instead, the |NCS| version is taken from the :makevar:`ZEPHYR_BASE` environment variable.
-This means that all freestanding applications will use the same |NCS| version and the same copy of the SDK.
+The build system will find the location of the SDK through the :makevar:`ZEPHYR_BASE` environment variable, which is set either through a script or manually in an IDE.
 
 With this kind of application, the workspace has the following structure: