5.27.1 release (#6409)
5.27.1 release (#6409)

* Bookkeeping for 5.27.1 release

* Reset for next release
Project-OSRM/osrm-backend,Project-OSRM/osrm-backend,Project-OSRM/osrm-backend,Project-OSRM/osrm-backend,frodrigo/osrm-backend,frodrigo/osrm-backend,frodrigo/osrm-backend,frodrigo/osrm-backend