Update chart titles on stats/longterm.html

4 jobs for master in 20 minutes and 20 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #99498
test

00:06:03

 
  Build
passed #99499
backend

00:14:17

passed #99500
frontend

00:01:53

passed #99501
stats

00:00:25