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

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

src/qibolab/sweeper.py

@@ -9,7 +9,6 @@
 from .pulses import Pulse
 from .serialize import Model
 
-
 _PULSE = "pulse"
 _CHANNEL = "channel"
 
@@ -27,7 +26,7 @@ class Parameter(Enum):
     @classmethod
     def channels(cls) -> set["Parameter"]:
         """Set of parameters to be swept on the channel."""
-        return set(p for p in cls if p.value[1] == _CHANNEL)
+        return {p for p in cls if p.value[1] == _CHANNEL}
 
 
 _Field = tuple[Any, str]