Fix[hardware_predict]: Fixed working directory changing

Author: Djokzer

hls4ml/backends/vitis_accelerator/vitis_accelerator_backend.py

@@ -167,6 +167,7 @@ def hardware_predict(self, model, x, target="hw", debug=False, profilingRepeat=-
             print(f"X_test_flat_shape: {X_test_size}")
 
             # Change working directory to the HLS project directory
+            currdir = os.getcwd()
             os.chdir(model.config.get_output_dir())
 
             # Check if the shared library exists
@@ -184,7 +185,8 @@ def hardware_predict(self, model, x, target="hw", debug=False, profilingRepeat=-
             lib.predict(X_test_flat, X_test_size, predictions_ptr, predictions_size)
 
             # Change back to the original directory
-            os.chdir('../..')
+            os.chdir(currdir)
+
 
             # Reshape the predictions to match the expected output shape
             y_hls = predictions.reshape(-1, sampleOutputSIze)[:originalSampleCount, :]