Skip tips jobs on pre-commit config update

We only need to care about the unversioned tips jobs since [1] will take
care of the others.

[1] https://review.opendev.org/c/openstack/openstack-zuul-jobs/+/933197

Change-Id: I3d569dc496a995eee58fdbcf4a42a187143d1b24
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

.zuul.yaml

@@ -6,6 +6,11 @@
       Run unit tests for OpenStackClient with master branch of important libs.
 
       Takes advantage of the base tox job's install-siblings feature.
+    irrelevant-files: &common-irrelevant-files
+      - ^.*\.rst$
+      - ^doc/.*$
+      - ^releasenotes/.*$
+      - ^\.pre-commit-config\.yaml$
     required-projects:
       - openstack/cliff
       - openstack/keystoneauth