No API changes in 0.4.1 so far so just bump.

TODO: Maybe we should remove this version declaration, or make it 0.4.x?

Author: ximon18

doc/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: "3.0.2"
 info:
   title: Krill RPKI Server API
-  version: 0.4.0
+  version: 0.4.1
   description: |
     # Introduction
     Welcome to the documentation for the Krill server API, a JSON based