patch 8.1.0340: no test for :spellinfo

Problem:    No test for :spellinfo.
Solution:   Add a test. (Dominique Pelle, closes #3394)
diff --git a/src/version.c b/src/version.c
index ec13271..d5daaf4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    340,
+/**/
     339,
 /**/
     338,