patch 8.1.0168: output of :marks is too short with multi-byte chars

Problem:    Output of :marks is too short with multi-byte chars. (Tony
            Mechelynck)
Solution:   Get more bytes from the text line.
diff --git a/src/version.c b/src/version.c
index 43d3616..ce1c55b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    168,
+/**/
     167,
 /**/
     166,