qa/rgw: fix ignorelist entry for 'HEALTH_WARN 1 pool(s) full'

Fixes: https://tracker.ceph.com/issues/70712

Signed-off-by: Casey Bodley <[email protected]>

Author: cbodley

qa/suites/rgw/verify/tasks/rados-pool-quota.yaml

@@ -9,4 +9,4 @@ overrides:
     log-ignorelist:
       - reached quota
       - POOL_FULL
-      - pool(s) full
+      - pool\(s\) full