ONNX export Path to str() (ultralytics#12177)

* Update export.py

Signed-off-by: Luis Filipe Araujo de Souza <[email protected]>

* Update export.py

Signed-off-by: Luis Filipe Araujo de Souza <[email protected]>

* Update export.py

Transformed the f variable into a string on the export onnx. This bug was making it impossible to export any models in .onnx, since it was making the typehint not accept the users input as it is specified in the functions documentation

Signed-off-by: Luis Filipe Araujo de Souza <[email protected]>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Signed-off-by: Luis Filipe Araujo de Souza <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: Doquey

export.py

@@ -155,7 +155,7 @@ def export_onnx(model, im, file, opset, dynamic, simplify, prefix=colorstr('ONNX
     import onnx
 
     LOGGER.info(f'\n{prefix} starting export with onnx {onnx.__version__}...')
-    f = file.with_suffix('.onnx')
+    f = str(file.with_suffix('.onnx'))
 
     output_names = ['output0', 'output1'] if isinstance(model, SegmentationModel) else ['output0']
     if dynamic: