Update .gpg-id to use full key fingerprints
Update .gpg-id to use full key fingerprints

This is more secure, and also will make these easier to test against the
exported keys in gpg-keys.yml

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf