Linux add missing backslash

Author: lool

.github/workflows/linux.yml

@@ -63,7 +63,7 @@ jobs:
             fi
             # install build-dependencies; TODO: --no-install-recommends
             apt -y install git crossbuild-essential-arm64 make flex bison bc \
-                libelf-dev libssl-dev:arm64 dpkg-dev debhelper-compat kmod
+                libelf-dev libssl-dev:arm64 dpkg-dev debhelper-compat kmod \
                 python3 rsync coreutils
             scripts/build-linux-deb.sh