patch 9.1.1294: gui tabline menu does not use confirm when closing tabs

Problem:  gui tabline menu does not use confirm when closing tabs
Solution: use ":confirm tabclose" explicitly (JMcKiern)

closes: #17093

Signed-off-by: JMcKiern <jmckiern@tcd.ie>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 726629c..2e2debb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1294,
+/**/
     1293,
 /**/
     1292,