content/_index.md: add FOSDEM devroom, CfP reference

Signed-off-by: Thilo Fromm <thilofromm@microsoft.com>

Author: t-lo

content/_index.md

@@ -23,6 +23,16 @@ Contributing members include people from Ubuntu Core, Debian, GNOME OS, Fedora C
 systemd, image-builder/osbuild, mkosi, tpm2-software, System Transparency, buildstream, BTRFS, rpm-ostree,
 Microsoft, Amazon, and Meta.
 
+## News
+
+* 2022-11-07: FOSDEM 2023 devroom accepted. <br />
+  We'll have a devroom at FOSDEM 2023 - on Saturday, February 4 - for the first half of the day (morning until noon).<br />
+  Drop in for talks on Image-based Linux and secure / attestable systems, and for a chat with other UAPI folks.<br />
+  Want to submit a talk? Our **Call for Participation** is currently open; head over to https://uapi-group.org/docs/conferences/2023-02-04__fosdem-devroom for more information.
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 ## Engage with the Group
 
 Our main means of engagement is Github.