Fix parameter indentation

Change-Id: Ib015bef4b7e28a43ba818c6229fd251ab4ed8d41
Prod-related: PROD-27850 (PROD:27850)
diff --git a/salt/master/single.yml b/salt/master/single.yml
index 710b6f7..c007031 100644
--- a/salt/master/single.yml
+++ b/salt/master/single.yml
@@ -15,7 +15,8 @@
       worker_threads: ${_param:salt_master_worker_threads}
       max_open_files: 15000
       command_timeout: 10
-      gather_job_timeout: 40
+      opts:
+        gather_job_timeout: 40
       peer:
         '.*':
           - x509.sign_remote_certificate