[gobject-introspection] Add "forever" scope to docs

[Emmanuele Bassi <ebassi src gnome org>]

commit dd6140f3a5b867f0a3beb26ec68bb845d1fe603e
Author: badcel <33569-badcel users noreply gitlab gnome org>
Date:   Fri Jan 21 20:06:08 2022 +0100

    Add "forever" scope to docs

 docs/website/annotations/giannotations.rst | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/docs/website/annotations/giannotations.rst b/docs/website/annotations/giannotations.rst
index eaadf0ec..7ed1a7cf 100644
--- a/docs/website/annotations/giannotations.rst
+++ b/docs/website/annotations/giannotations.rst
@@ -312,6 +312,7 @@ Scope types:
   Can only be called once.
 * ``notified`` - valid until the GDestroyNotify argument is called.
   Can be called multiple times before the GDestroyNotify is called.
+* ``forever`` - valid until the process terminates.
 
 An example of a function using the ``call`` scope is ``g_slist_foreach()``.
 For ``async`` there is ``g_file_read_async()`` and for notified