Small modifications to bundle.yaml

[rjyounes]

1. Add these prefixes to the SPARQL query for the action generating rdfs:labels.

@prefix media-app: <https://www.iana.org/assignments/media-types/application/> .
@prefix media-txt: <https://www.iana.org/assignments/media-types/text/> .

2. Rename the action to include rdfs:comment, for clarity.

3. Target files should exclude gistValidationAnnotations.ttl. In release 11.1.0, gist:nonConformingLabel is not included in rdfsAnnotations.ttl, for reasons I don't understand. It would be nice to figure out why this is so, but failing that it might be prudent to list the files rather than using a wildcard include value.