Added temporary FOSDEM link

Author: quintessence

community.hachyderm.io/content/en/docs/volunteering/_index.md

@@ -6,6 +6,10 @@ description: >
   So you're interested in voluntering with Hachyderm?
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+{{% pageinfo %}}
+<p align="center"><strong>[Please join us at our FOSDEM BOF!](https://fosdem.org/2026/schedule/event/3C3SX8-hachyderm-nivenly-bof/)</strong> 🎉</p>
+{{% /pageinfo %}}
+
 Hachyderm is looking for volunteers across four teams: Moderation, Infrastructure, and Security. Below you'll find what each team does and what we're looking for.
 
 ## Moderation