Update version of Black to 22.3.0

Update version of Black to 22.3.0 due to updated dependencies.
Updates to fix reported issues due to new version.

Signed-off-by: Jonas Ohlsson <jonas.ohlsson@arm.com>
Change-Id: I60056aae452093ce8dcea1f499ecced22b25eef1
diff --git a/ethosu/vela/api.py b/ethosu/vela/api.py
index f49df25..3382ea9 100644
--- a/ethosu/vela/api.py
+++ b/ethosu/vela/api.py
@@ -139,11 +139,11 @@
         return self.value[1]
 
     def size_in_bits(self) -> int:
-        """ Size of the data type in bits"""
+        """Size of the data type in bits"""
         return self.value[0]
 
     def size_in_bytes(self) -> int:
-        """ Size of the data type in bytes"""
+        """Size of the data type in bytes"""
         return self.value[0] // 8
 
     def min_value(self) -> int: