l10n_fr: use "à l'état", not "en état" for workflow state

the later does not seem correct to me
3 jobs for feat/solve-divergence-l10n-fr in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner1

01:01:13

passed ERP5.PerformanceTest-TestRunner1

00:33:11

failed ERP5.UnitTest-TestRunner1

02:01:12