Update docker.io/nextcloud Docker tag to v30.0.4

Semiautomated major upgrade by means of Watchtower Docker container management with dependency update facilitated by Mend's Renovate Bot.

This MR contains the following updates:

Package Update Change
docker.io/nextcloud patch 30.0.2-apache -> 30.0.4-apache

Release Notes

nextcloud/server (docker.io/nextcloud)

v30.0.4

Compare Source

What's Changed

Full Changelog: https://github.com/nextcloud/server/compare/v30.0.3...v30.0.4

v30.0.3

Compare Source

What's Changed

Full Changelog: https://github.com/nextcloud/server/compare/v30.0.2...v30.0.3