typo fix in earth light crossing

This MR resolves a small typo in the ROQ likelihood. The light crossing time was half what it should have been, the maximum crossing time is diameter / speed not radius / speed as currently calculated.

This doesn't make a difference when the time reference is the geocentre, but can break when using the reference time at an interferometer.

added Bug Likelihood ROQ labels

changed milestone to %1.1.4

approved this merge request

approved this merge request

mentioned in commit 13b517b5

merged