ci: install dbus-devel for the Rust connector's keyring backend

cargo build of bonsaiviewer-autodesk pulls dbus-secret-service (the Linux
OS-keyring backend for credential storage) -> dbus -> libdbus-sys, whose
build.rs needs dbus-1.pc via pkg-config. GitHub's ubuntu runners ship
libdbus-1-dev, so the dedicated connector workflow never needed it; the
minimal Rocky container doesn't. Add dbus-devel to both Rocky jobs
(pkg-config is already present). This was the last step after a fully
successful C++ build + cargo compile.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.github/workflows/build_rocky.yml

@@ -25,7 +25,8 @@ jobs:
                          sqlite-devel bzip2-devel zlib-devel openssl-devel xz-devel      \
                          readline-devel ncurses-devel libffi-devel libuuid-devel git-lfs \
                          findutils xz byacc patchelf libxkbcommon-devel                 \
-                         python3.11 python3.11-pip python3.11-tkinter
+                         python3.11 python3.11-pip python3.11-tkinter \
+                         dbus-devel
           python3 -m pip install typing_extensions aqtinstall
           git config --global --add safe.directory '*'
           python3.11 -c "import tkinter; print('Tk', tkinter.TkVersion)"