[FIX] doc: active is auto installed

--
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

closes odoo/odoo#59850

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

doc/reference/module.rst

@@ -141,8 +141,7 @@ Available manifest fields are:
     These hooks should only be used when setup/cleanup required for this module
     is either extremely difficult or impossible through the api.
 ``active`` (``bool``)
-    This indicates whether this module is to be used or not.
-    It is generally used to archive obsolete modules.
+    This indicates whether this module must install automatically or not.
 
 .. _semantic versioning: https://semver.org
 .. _existing categories: