[FIX] project_todo: Impossible to chose a project with no company

Steps to reproduce the issue:

- Go to the To-do app
- Open a task and try to convert it to a task
- Look for P

Bug:

P was not suggested

opw:3478943

X-original-commit: e0e3d35c7f53b9a87de366bf2cca96c1ca3be960
Part-of: odoo/odoo#134346

addons/project_todo/views/project_task_views.xml

@@ -159,7 +159,7 @@
                 <sheet>
                     <group>
                         <field name="project_id"
-                               domain="[('company_id', 'in', context.get('allowed_company_ids'))]"
+                               domain="['|', ('company_id', 'in', context.get('allowed_company_ids')), ('company_id', '=', False)]"
                                required="1"
                                placeholder="Select an existing project"
                                default_focus="1"/>