Release note for function alias in job

Change-Id: Ic998e1fec8c8807993d695273e3822e652793a51
Story: 2005921
Task: 34263

releasenotes/notes/function-alias-in-job-d3f969306b7a4749.yaml

@@ -0,0 +1,3 @@
+fixes:
+  - When creating job with function alias, the job could always pick up the
+    updated function and its version corresponding to the alias.