workflows: Build with FUSE 3 for Ubuntu 20.04, or FUSE 2 for 18.04

This ensures we exercise both code paths.

Signed-off-by: Simon McVittie <smcv@collabora.com>

.github/workflows/check.yml

@@ -148,7 +148,7 @@ jobs:
         sudo apt-get update
         sudo add-apt-repository 'deb https://download.mono-project.com/repo/ubuntu stable-focal main' # Needed for updates to work
         sudo apt-get install -y libglib2.0 attr automake gettext autopoint bison  dbus gtk-doc-tools \
-        libfuse-dev ostree libostree-dev libarchive-dev libzstd-dev libcap-dev libattr1-dev libdw-dev libelf-dev python3-pyparsing \
+        libfuse3-dev ostree libostree-dev libarchive-dev libzstd-dev libcap-dev libattr1-dev libdw-dev libelf-dev python3-pyparsing \
         libjson-glib-dev shared-mime-info desktop-file-utils libpolkit-agent-1-dev libpolkit-gobject-1-dev \
         libseccomp-dev libsoup2.4-dev libsystemd-dev libxml2-utils libgpgme11-dev gobject-introspection \
         libgirepository1.0-dev libappstream-dev libdconf-dev clang socat meson libdbus-1-dev \