component/firefox: use firefox 115 / geckodriver 0.33.0 by default

this applies to software/seleniumrunner and testnodes
3 jobs for feat/firefox-115 in 0 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-TestRunner1.Python2

00:15:16

passed SlapOS.Eggs.UnitTest-TestRunner1.Python3

00:15:30

failed SlapOS.SoftwareReleases.IntegrationTest-TestRunner1

06:05:25