patch 9.0.1067: in diff mode virtual text is highlighted incorrectly

Problem:    In diff mode virtual text is highlighted incorrectly. (Rick Howe)
Solution:   Do not use diff attributes for virtual text. (closes #11714)
diff --git a/src/version.c b/src/version.c
index d8fe154..7722f3d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1067,
+/**/
     1066,
 /**/
     1065,