arrow

MINOR: [Archery] Add collaborators to list of roles with access to trigger bot tasks (#14727)

I've been added as triager but now if I try to trigger crossbow tasks they fail with permissions issues:
https://github.com/apache/arrow/pull/14715#issuecomment-1326243342
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Only contributors can submit requests to this bot. Please ask someone from the community for help with getting the first commit in.
The Archery job run can be found at: https://github.com/apache/arrow/actions/runs/3539688563
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This should fix the issue

Authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>