fix(i18n): replace broken relative links to awesome-transformers.md with absolute URLs (#44905)
13 i18n README files referenced `./awesome-transformers.md` which resolves
to `i18n/awesome-transformers.md` — a non-existent path. Replace with the
absolute GitHub URL so links work regardless of the file's location.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>