component/haproxy: Version up

Patched, see: https://github.com/haproxy/haproxy/issues/2033
1 job for feature/haproxy-2.6.8 in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS.SoftwareReleases.IntegrationTest-luke/feature/haproxy-2.6.8

13:34:49