Unpin loggregator release
Unpin loggregator release

cf-deployment v12.15.0 comes with loggregator 106.2.1. Previously, we'd pinned
105.6. This commit unpins it so we deploy the newer version.

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