fix(parse_as_gha_url): job URL changed from jobs/ to job/

[gadenbuie]

Fixes #89

parse_as_gha_url("https://github.com/r-lib/sessioninfo/actions/runs/10251844492/job/28360805716")
#>   owner        repo      run_id     html_id
#> 1 r-lib sessioninfo 10251844492 28360805716

GHA updated the URL structure replacing jobs/ with job/ in the URL. I updated the regular expression to make the trailing s optional. After this fix, the following use of session_diff() should work again.

sessioninfo::session_diff(new = "https://github.com/r-lib/sessioninfo/actions/runs/10251844492/job/28360805716")

[gaborcsardi]

Great, thanks a lot!