[TOPF] [ZaPF] Neue Discourse-Version, Update verfügbar

Hooray, a new version of [Discourse](https://www.discourse.org) is available! Your version: 2.4.3 New version: **2.6.0.beta6** - Upgrade using our easy **[one-click browser upgrade](https://talk.zapf.in/admin/upgrade)** - See what's new in the [release notes](https://meta.discourse.org/tag/release-notes) or view the [raw GitHub changelog](https://github.com/discourse/discourse/commits/master) - Visit [meta.discourse.org](https://meta.discourse.org) for news, discussion, and support for Discourse