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/our-lady-of-ransom-collect.yml

@@ -11,7 +11,7 @@ text:
     ómnibus et captivitáte dǽmonis liberémur.
     Per eúndem 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.
     O God, Who didst use the glorious Mother of thy Son as a mean to
@@ -22,7 +22,7 @@ text:
     all sin and all bondage unto the evil one.
     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