[FIX] agreement_legal: fix action open agreement

agreement_legal/models/res_partner.py

@@ -22,10 +22,13 @@ class Partner(models.Model):
 
     def action_open_agreement(self):
         self.ensure_one()
-        action = self.env.ref("agreement.agreement_action")
-        result = action.read()[0]
-        result["domain"] = [("partner_id", "=", self.id)]
-        result["context"] = {
-            "default_partner_id": self.id,
-        }
-        return result
+        action = self.env["ir.actions.actions"]._for_xml_id(
+            "agreement.agreement_action"
+        )
+        action.update(
+            {
+                "domain": [("partner_id", "=", self.id)],
+                "context": {"default_partner_id": self.id},
+            }
+        )
+        return action