config.yaml: fix whitespace

Fixes 194d63c

Author: dustymabe

config.yaml

@@ -21,7 +21,7 @@ streams:
       # type: development # do not touch; line managed by `next-devel/manage.py`
     rawhide:
       type: mechanical
-   branched:
+    branched:
       type: mechanical
     # bodhi-updates:
     #   type: mechanical