patch 8.2.0304: terminal test if failing on some systems

Problem:    Terminal test if failing on some systems.
Solution:   Wait for the job to finish. (James McCoy)
diff --git a/src/version.c b/src/version.c
index 97669c0..ce3702d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    304,
+/**/
     303,
 /**/
     302,