qapi/pylintrc: ignore 'consider-using-f-string' warning

Pylint 2.11.x adds this warning. We're not yet ready to pursue that
conversion, so silence it for now.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210930205716.1148693-2-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

scripts/qapi/pylintrc

@@ -23,6 +23,7 @@ disable=fixme,
         too-many-branches,
         too-many-statements,
         too-many-instance-attributes,
+        consider-using-f-string,
 
 [REPORTS]