rename the default group to by more readable

Author: rambo

src/rasenmaeher_api/kchelpers.py

@@ -210,7 +210,7 @@ async def ensure_product_groups(self) -> Optional[bool]:
             subgroups_by_name: Dict[str, Dict[str, Any]] = {
                 subgroup["name"]: subgroup for subgroup in group["subGroups"]
             }
-            subgrpname = f"{productname}_dflt"
+            subgrpname = f"{productname}_default"
             if subgrpname not in subgroups_by_name:
                 LOGGER.info("Creating KC group /{}/{}".format(productname, subgrpname))
                 new_id = await self.kcadmin.a_create_group({"name": subgrpname}, parent=group["id"])