[FIX] fieldservice: unaccent parent path

Silences the following warning:

WARNING ? odoo.models: parent_path field on model 'fsm.category'
should have unaccent disabled. Add `unaccent=False`
to the field definition.

fieldservice/models/fsm_category.py

@@ -14,7 +14,7 @@ class FSMCategory(models.Model):
 
     name = fields.Char(required="True")
     full_name = fields.Char(compute="_compute_full_name", store=True, recursive=True)
-    parent_id = fields.Many2one("fsm.category", string="Parent", index=True)
+    parent_id = fields.Many2one("fsm.category", string="Parent", index=True, unaccent=False)
     parent_path = fields.Char(index=True)
     child_id = fields.One2many("fsm.category", "parent_id", "Child Categories")
     color = fields.Integer("Color Index", default=10)