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/st-jerome-commemoration.yml

@@ -14,7 +14,7 @@ text:
     Orémus.
     Deus, qui Ecclésiæ tuæ in exponéndis sacris Scriptúris beátum Hierónymum, Confessórem tuum, Doctórem máximum providére dignátus es: præsta, quǽsumus; ut, ejus suffragántibus méritis, quod ore simul et ópere dócuit, te adjuvánte, exercére valeámus.
     Per 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. Well done, thou good and faithful servant; thou hast been faithful over a few things, I will make thee ruler over many things; enter thou into the joy of thy Lord.
     V. The mouth of the righteous speaketh wisdom.
@@ -22,7 +22,7 @@ text:
     Let us pray.
     O God, Who wast pleased to give unto thy Church thy blessed Confessor Jerome to be unto her a great teacher in the way of expounding thine Holy Scriptures, be entreated, we beseech thee, for that thy servant's sake, and grant unto us the strength to put in practice what he taught both by his doctrine and by his life.
     Through 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: draft
   en: draft