Update teampubkeys.gpg
Add Ryan K.
Remove Richard C., Richard P., old Abraham M. key
Part of https://gitlab.developers.cam.ac.uk/uis/devops/admin/-/issues/285
Edited by Dr Abraham Martin
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Add Ryan K.
Remove Richard C., Richard P., old Abraham M. key
Part of https://gitlab.developers.cam.ac.uk/uis/devops/admin/-/issues/285