Skip running long jobs for releasenote changes

Change-Id: Ifdb2099418cc743607a062b7fb2ee43451b40c2a
(cherry picked from commit 00aa6679a927f3ed9cc230e7679b97fb27a1468c)
diff --git a/zuul.d/docs.yaml b/zuul.d/docs.yaml
index fe627e2..ff03a51 100644
--- a/zuul.d/docs.yaml
+++ b/zuul.d/docs.yaml
@@ -25,3 +25,4 @@
     parent: tox-docs
     files:
       - ^doc/
+      - ^releasenotes/