Fix literal

Author: simonschoelly

src/lightly_train/_commands/export_task.py

@@ -75,7 +75,7 @@ def export_onnx(
     num_channels: int = 3,
     height: int = 224,
     width: int = 224,
-    precision: str = Literal["32-true", "16-true"],
+    precision: Literal["32-true", "16-true"] = "32-true",
     verify: bool = True,
     overwrite: bool = False,
     format_args: dict[str, Any] | None = None,
@@ -92,7 +92,7 @@ def _export_task(
     num_channels: int = 3,
     height: int = 224,
     width: int = 224,
-    precision: str = Literal["32-true", "16-true"],
+    precision: Literal["32-true", "16-true"] = "32-true",
     verify: bool = True,
     overwrite: bool = False,
     format_args: dict[str, Any] | None = None,