Increase PostgreSQL_PendingWALFiles.. alert to 5k (!4453) · Merge requests · GitLab.com / Runbooks · GitLab

Increase `PostgreSQL_PendingWALFilesTooHigh` from `3k` to `5k` to reduce the high number of fase positives, regarding https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/15362#note_881954750.