change url

will now go to the code coverage report
5 jobs for add_coverage_badge in 12 minutes and 8 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Analyze
passed #79450756
dartanalyze

00:05:39

passed #79450755
dartfmt

00:04:55

 
  Test
passed #79450758
test_in_chrome

00:05:55

passed #79450759
test_in_firefox

00:06:29

passed #79450757
test_in_vm

00:02:29