ci: also install libudev-dev + libdbus-1-dev (tokio-serial / dbus)

After adding the GTK/glib set, the next blocker was `libudev-sys` (pulled by
`tokio-serial` in `wifi-densepose-desktop`):

  pkg-config exited with status code 1
  > pkg-config --libs --cflags libudev
  The system library `libudev` required by crate `libudev-sys` was not found.

Add `libudev-dev` (and `libdbus-1-dev` defensively — Tauri's runtime
notification/tray paths use it).

Co-Authored-By: claude-flow <ruv@ruv.net>

.github/workflows/ci.yml

@@ -84,7 +84,7 @@ jobs:
     # workspace test fails at the build step before any test runs (every recent
     # main CI run has been red on this for exactly this reason). Install the
     # standard Tauri-on-Ubuntu set.
-    - name: Install Tauri / GTK system dev libraries
+    - name: Install Tauri / GTK / serial system dev libraries
       run: |
         sudo apt-get update
         sudo apt-get install -y --no-install-recommends \
@@ -96,6 +96,8 @@ jobs:
           libayatana-appindicator3-dev \
           librsvg2-dev \
           libxdo-dev \
+          libudev-dev \
+          libdbus-1-dev \
           libssl-dev \
           pkg-config