added missing docs for option in acl module (#50775)

* added missing docs for option in acl module
* remove acl from ignore

changelogs/fragments/acl_doc_fix.yml

@@ -0,0 +1,2 @@
+bugfixes:
+    - document old option that was initally missed

lib/ansible/modules/files/acl.py

@@ -70,6 +70,12 @@ options:
     type: bool
     default: no
     version_added: '2.0'
+  use_nfsv4_acls:
+    description:
+      - Use NFSv4 ACLs instead of POSIX ACLs.
+    type: bool
+    default: no
+    version_added: '2.2'
   recalculate_mask:
     description:
     - Select if and when to recalculate the effective right masks of the files.

test/sanity/validate-modules/ignore.txt

@@ -402,8 +402,6 @@ lib/ansible/modules/database/proxysql/proxysql_scheduler.py E322
 lib/ansible/modules/database/vertica/vertica_role.py E322
 lib/ansible/modules/database/vertica/vertica_schema.py E322
 lib/ansible/modules/database/vertica/vertica_user.py E322
-lib/ansible/modules/files/acl.py E322
-lib/ansible/modules/files/acl.py E325
 lib/ansible/modules/files/assemble.py E323
 lib/ansible/modules/files/assemble.py E324
 lib/ansible/modules/files/blockinfile.py E324