patch 9.0.1896: "below" virtual text doesn't work with 'rightleft'

Problem:  "below" virtual text doesn't work with 'rightleft'.
Solution: Use column from right border with 'rightleft'.

closes: #13071

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
diff --git a/src/version.c b/src/version.c
index c56ef4c..937f8b8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1896,
+/**/
     1895,
 /**/
     1894,