patch 8.2.4853: CI with FreeBSD is a bit outdated

Problem:    CI with FreeBSD is a bit outdated.
Solution:   Use 12.3 instead of 12.1. (closes #10333)

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4853,
 /**/
     4852,
 /**/