fix(de-AT): support parsing "Jänner" with de-AT locale
fix(de-AT): support parsing "Jänner" with de-AT locale: a task in repo2rlenv-v083-pr diff (Harbor dataset). Title: fix(de-AT): support parsing "Jänner" with de-AT locale
The task
**Title:** fix(de-AT): support parsing "Jänner" with de-AT locale
Part of AdithyaSK/repo2rlenv-v083-pr_diff.