patch 8.2.1965: Vim9: tests fail without the channel feature

Problem:    Vim9: tests fail without the channel feature.
Solution:   Check if the channel feature is present. (Dominique Pellé,
            closes 7270)
diff --git a/src/version.c b/src/version.c
index 19f5ba2..786e05e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1965,
+/**/
     1964,
 /**/
     1963,