ressources: add link to FOSDEM distro devroom talk, it'll be streamed

Signed-off-by: Holger Levsen <holger@layer-acht.org>

_data/presentations.yml

+- title: a tale of several distros joining forces for a common goal, reproducible builds
+  presented_by: Holger Levsen, Jelle van der Waa, kpcyrd
+  event:
+    url: https://fosdem.org/2025/schedule/event/fosdem-2025-6479-a-tale-of-several-distros-joining-forces-for-a-common-goal-reproducible-builds/
+    name: FOSDEM 2025
+    location: Brussels, Belgium
+    date: 2025-02-02
+  video:
+    url:  https://live.fosdem.org/watch/h1302
+  slides: https://reproducible-builds.org/_lfs/presentations/coming_soon
+
 - title: Rebuilding what is distributed from ftp.debian.org
   presented_by: Holger Levsen
   event: