patch 9.1.0481: Vim9: term_getjob() throws an exception on error

Problem:  Vim9: term_getjob() throws an exception on error
Solution: Return null_job instead, when there is no job
          (Ernie Rael)

closes: #14984

Signed-off-by: Ernie Rael <errael@raelity.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 89ba9fc..1360d1c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    481,
+/**/
     480,
 /**/
     479,