www/osrm-backend: Update to 5.16.3

• Changes from 5.16.2:
  • • FIXED: Remove the last short annotation segment in trimShortSegments
  • Performance
    • FIXED: Speed up response time when lots of legs exist and geojson is used with steps=true

PR: 226481
Submitted by: Andreas Andersson <a.andersson.thn@gmail.com> (maintainer)