propers: Benedictus antiphons for September's sanctoral entries (5/5)

4 authored fresh (Matthew, Ss. Cyprian and Justina, Ss. Cosmas and
Damian, Jerome), 1 corrected (the Nativity of the BVM -- confirmed
sourced from the Roman rite's raw [Ant 1] rather than a real Monastic
1617 rendering, same pattern as every month so far).

Matthew needed the same register fix as Matthias/Barnabas/James the
Greater/Bartholomew (Matt 19:27ff, same verse): the source's own
English existed but read jarringly modern next to everything else,
reworded to match and marked draft.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

TODO.md

@@ -150,7 +150,11 @@ saint has the same kind of mismatch.
   James the Greater], Louis, Zephyrinus, Augustine), 2 already correct as
   found (Finding of St. Stephen, the Decollation of St. John the Baptist
   — both plain unmodified matches against the live query, no fix needed).
-- **September-December (29 saints): not started.**
+- **September (5 total): done, all 5.** 1 corrected (Nativity of the BVM),
+  4 authored fresh (Matthew [reworded English, same fix as Matthias/
+  Barnabas/James the Greater/Bartholomew], Ss. Cyprian and Justina,
+  Ss. Cosmas and Damian, Jerome).
+- **October-December (24 saints): not started.**
 - **~52 temporal entries: not started.**
 - **94 `propers: null` saints: not started** — need a collect authored (a
   bigger, separate task) before an antiphon id even has anywhere to attach.