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

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

src/qibotn/backends/cutensornet.py

@@ -16,7 +16,7 @@ class CuTensorNet(QibotnBackend, NumpyBackend):  # pragma: no cover
         super().__init__()
         import cuquantum
         from cuquantum import cutensornet as cutn  # pylint: disable=import-error
-        
+
         if runcard is not None:
             self.MPI_enabled = runcard.get("MPI_enabled", False)
             self.NCCL_enabled = runcard.get("NCCL_enabled", False)