patch 8.2.2357: Vim9: crash when parsing function return type fails

Problem:    Vim9: crash when parsing function return type fails.
Solution:   Bail out and set return type to "unknown". (closes #7685)
diff --git a/src/version.c b/src/version.c
index 9d217e2..e741740 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2357,
+/**/
     2356,
 /**/
     2355,