patch 8.2.3820: "vrc" does not replace composing characters

Problem:    "vrc" does not replace composing characters, while "rc" does.
Solution:   Check the byte length including composing characters.
            (closes #9351)

src/version.c

@@ -749,6 +749,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3820,
 /**/
     3819,
 /**/