patch 8.1.2003: MS-Windows: code page 65001 is not recognized

Problem:    MS-Windows: code page 65001 is not recognized.
Solution:   Use utf-8 for code page 65001. (Dan Thompson, closes #4902)
diff --git a/src/version.c b/src/version.c
index 7f3310e..8097677 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2003,
+/**/
     2002,
 /**/
     2001,