patch 8.2.2436: Vim9 script test is a bit flaky

Problem:    Vim9 script test is a bit flaky.
Solution:   Wait longer for exit callback.

src/testdir/test_vim9_script.vim

@@ -3278,7 +3278,8 @@ def Test_no_unknown_error_after_error()
       while job_status(myjob) == 'run'
         sleep 10m
       endwhile
-      sleep 10m
+      # wait for Exit_cb() to be called
+      sleep 100m
   END
   writefile(lines, 'Xdef')
   assert_fails('so Xdef', ['E684:', 'E1012:'])

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2436,
 /**/
     2435,
 /**/