patch 9.0.0891: virtual text below after match has wrong highlight

Problem:    Virtual text below after match has wrong highlight.
Solution:   Restore search_attr only after the virtual text.
            (closes #11446)
diff --git a/src/version.c b/src/version.c
index 927f9c0..0423d0d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    891,
+/**/
     890,
 /**/
     889,