.coafile: Ignore openhub module

The openhub module got disabled due to some
reasons in community project last year. And,
currently the module is raising the CI errors
which need to be avoided. They can be worked
on once we're ready to enable the openhub
module once again in this project in future.

.coafile

@@ -1,6 +1,6 @@
 [all]
 files = **.py, **.js, **.sh
-ignore = .git/**, **/__pycache__/**, gci/client.py, */migrations/**, private/*, **/leaflet_dist/**
+ignore = .git/**, **/__pycache__/**, gci/client.py, */migrations/**, private/*, **/leaflet_dist/**, openhub/**
 max_line_length = 80
 use_spaces = True
 preferred_quotation = '