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/ss-primus-and-felicianus-collect.yml

@@ -7,12 +7,12 @@ text:
     Orémus.
     Fac nos, quǽsumus, Dómine, sanctórum Mártyrum tuórum Primi et Feliciáni semper festa sectári: quorum suffrágiis protectiónis tuæ dona sentiámus.
     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: |
     Let us pray.
     Make us, O Lord, we beseech thee, ever heartily to rejoice over thine holy martyrs Primus and Felician, and grant to us at their prayer the gift of thy safe-keeping.
     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: verified
   en: verified