misc: Run pre-commit run --all-files

This is reflect the updates made to black when running `pre-commit
autoupdate`.

Change-Id: Ifb7fea117f354c7f02f26926a5afdf7d67bc5919

src/mem/cache/Cache.py

@@ -46,6 +46,7 @@ from m5.objects.Prefetcher import BasePrefetcher
 from m5.objects.ReplacementPolicies import *
 from m5.objects.Tags import *
 
+
 # Enum for cache clusivity, currently mostly inclusive or mostly
 # exclusive.
 class Clusivity(Enum):