Fix isort on incorrect files

boards/boardsource/3x4/main.py

@@ -1,4 +1,5 @@
 from kb import KMKKeyboard
+
 from kmk.keys import KC
 from kmk.modules.layers import Layers
 

boards/boardsource/4x12/main.py

@@ -1,4 +1,5 @@
 from kb import KMKKeyboard
+
 from kmk.extensions.media_keys import MediaKeys
 from kmk.keys import KC
 from kmk.modules.layers import Layers

boards/boardsource/5x12/main.py

@@ -1,4 +1,5 @@
 from kb import KMKKeyboard
+
 from kmk.extensions.media_keys import MediaKeys
 from kmk.keys import KC
 from kmk.modules.layers import Layers

boards/boardsource/microdox/main.py

@@ -1,4 +1,5 @@
 from kb import KMKKeyboard
+
 from kmk.keys import KC
 from kmk.modules.layers import Layers
 from kmk.modules.split import Split, SplitSide, SplitType