fix: Replaced pathlib relative_to with os.relpath (#1505)

* fix: Replaced pathlib relative_to with os.relpath

* Formatted with black

snakemake/deployment/conda.py

@@ -306,7 +306,7 @@ def execute_deployment_script(self, env_file, deploy_file):
             )
         logger.info(
             "Running post-deploy script {}...".format(
-                Path(deploy_file).relative_to(os.getcwd())
+                os.path.relpath(path=deploy_file, start=os.getcwd())
             )
         )
         conda = Conda(self._container_img)