[5.0.x] Refs #35354 -- Clarified FORCE_SCRIPT_NAME docs.

Backport of ca5cd3e3e8e53f15e68ccd727ec8fe719cc48099 from main

docs/ref/settings.txt

@@ -1685,7 +1685,7 @@ the server-provided value of ``SCRIPT_NAME``, which may be a rewritten version
 of the preferred value or not supplied at all. It is also used by
 :func:`django.setup()` to set the URL resolver script prefix outside of the
 request/response cycle (e.g. in management commands and standalone scripts) to
-generate correct URLs when ``SCRIPT_NAME`` is not ``/``.
+generate correct URLs when ``FORCE_SCRIPT_NAME`` is provided.
 
 .. setting:: FORM_RENDERER