Release hacking 6.0.1

Hacking fixed a small bug exposed by the move from flake8 from 4 to 5
in hacking 6.0.0. Make a bugfix release.

Change-Id: I87b9d122d45b934a27e91cc4cdcb5e955d5da7d4

deliverables/_independent/hacking.yaml

@@ -156,5 +156,9 @@ releases:
     projects:
       - repo: openstack/hacking
         hash: 3fde1e570a064ce38e7c512b16610ff4650426c3
+  - version: 6.0.1
+    projects:
+      - repo: openstack/hacking
+        hash: 8d0a4a18747dd7023a684123799f5773c49de0f3
 repository-settings:
   openstack/hacking: {}