patch 8.2.1168: wrong method argument for appendbufline()

Problem:    Wrong method argument for appendbufline().
Solution:   Use FEARG_3.
diff --git a/src/version.c b/src/version.c
index c607f4e..0b31e54 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1168,
+/**/
     1167,
 /**/
     1166,