Fix counts_path resolution in toolbox.py

Author: jlelia

src/cellpyability/toolbox.py

@@ -253,7 +253,7 @@ def run_cellprofiler(image_dir, counts_file=None, output_dir=None):
 
     # If a counts file is provided, use it instead of running CellProfiler
     if counts_file is not None:
-        counts_path = Path(counts_file),resolve()
+        counts_path = Path(counts_file).resolve()
         if not counts_path.exists():
             logger.critical(f'Counts file {counts_file} does not exist.')
             exit(1)