patch 8.0.0245: zh_CN.cp936.po has a conversion error

Problem:    The generated zh_CN.cp936.po message file is not encoded properly.
Solution:   Instead of using zh_CN.po as input, use zh_CN.UTF-8.po.
diff --git a/src/version.c b/src/version.c
index e0f23d0..a2ebcf5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    245,
+/**/
     244,
 /**/
     243,