patch 8.0.1823: test for terminal stdout redirection is flaky

Problem:    Test for terminal stdout redirection is flaky.
Solution:   Wait for the job to finish.
diff --git a/src/version.c b/src/version.c
index 981d650..8af1a95 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1823,
+/**/
     1822,
 /**/
     1821,