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

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

Author: pre-commit-ci[bot]

src/pypsa_app/backend/settings.py

@@ -256,9 +256,7 @@ def validate_local_mode(self) -> Self:
             )
             raise ValueError(msg)
         if self.local_mode and self.snakedispatch_backends:
-            msg = (
-                "SNAKEDISPATCH_BACKENDS is not yet implemented in LOCAL_MODE."
-            )
+            msg = "SNAKEDISPATCH_BACKENDS is not yet implemented in LOCAL_MODE."
             raise ValueError(msg)
         return self