Update ghcr.io/lovelaze/nebula-sync Docker tag to v0.9.0

Pi-hole nebula-sync successfully updated by means of fully automated Watchtower Docker container update with dependency update facilitated by Mend's Renovate Bot.

This MR contains the following updates:

Package	Update	Change
ghcr.io/lovelaze/nebula-sync	minor	`v0.8.0` -> `v0.9.0`

Release Notes

lovelaze/nebula-sync (ghcr.io/lovelaze/nebula-sync)

`v0.9.0`

Compare Source

Changelog

4ac532a Add support to use docker secret files for primary and replicas settings
24d0158 Fix debug config print displaying pointers