Normalize versicle notation to plain V./R. across propers

Unicode ℣/℟ (U+2123/U+211F) were mixed unpredictably with plain V./R.
across ~550 proper YAML files, sometimes within the same file. Screen
readers can't announce the unicode glyphs. Replace all instances with
plain text.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QC6jHsj75xcsTkapqJR6fD

src/data/propers/common/assumption-commemoration.yml

@@ -12,7 +12,7 @@ text:
     Orémus.
     Omnípotens sempitérne Deus, qui Immaculátam Vírginem Maríam, Fílii tui Genetrícem, córpore et ánima ad cæléstem glóriam assumpsísti: concéde, quǽsumus; ut ad supérna semper inténti, ipsíus glóriæ mereámur esse consórtes.
     Per eúmdem Dóminum nostrum Jesum Christum Fílium tuum, qui tecum vivit et regnat in unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
-    ℟. Amen.
+    R. Amen.
   en: |
     Ant. Who is she that cometh up like the rising dawn, fair as the moon, clear as the sun, terrible as a fenced camp set in battle array?
     V. Pray for us, holy Mother of God.
@@ -20,7 +20,7 @@ text:
     Let us pray.
     Almighty everlasting God, who hast taken body and soul into heaven the Immaculate Virgin Mary, Mother of thy Son: grant, we beseech thee, that by steadfastly keeping heaven as our goal we may be counted worthy to join her in glory.
     Through the same Jesus Christ, thy Son, Our Lord, Who liveth and reigneth with thee in the unity of the Holy Ghost, God, world without end.
-    ℟. Amen.
+    R. Amen.
 status:
   la: verified
   en: verified