patch 8.2.3845: Vim9: test fails when the channel feature is missing

Problem:    Vim9: test fails when the channel feature is missing.
Solution:   Check for the channel feature. (Dominique Pellé, closes #9368)
diff --git a/src/version.c b/src/version.c
index dbf2fe5..262a330 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3845,
+/**/
     3844,
 /**/
     3843,