patch 8.2.1396: Vim9: no error for unexpectedly returning a value

Problem:    Vim9: no error for unexpectedly returning a value.
Solution:   Only set the return type for lambda's.  Make using function type
            in a function reference work.
diff --git a/src/version.c b/src/version.c
index 870df17..8649ca8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1396,
+/**/
     1395,
 /**/
     1394,