Skip functional tests on pre-commit config update

This file is used only in code style checks

Change-Id: I131d963bab07eff4900f6ac79ca0386f0b0159bf

.zuul.yaml

@@ -5,6 +5,7 @@
     irrelevant-files:
       - ^(test-|)requirements.txt$
       - ^setup.cfg$
+      - ^\.pre-commit-config\.yaml$
     required-projects:
       - opendev.org/openstack/oslo.log
 
@@ -35,6 +36,7 @@
       - ^api-ref/.*$
       - ^doc/.*$
       - ^releasenotes/.*$
+      - ^\.pre-commit-config\.yaml$
 
 - project:
     check: