ci: wait for lxd to be ready

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@canonical.com>

Author: zyga

.github/workflows/snap-package.yml

@@ -68,6 +68,7 @@ jobs:
           sudo chmod 666 /var/snap/lxd/common/lxd/unix.socket
           sudo usermod -aG lxd $USER
           sudo lxd init --auto
+          sudo lxd waitready
 
       - name: Install snapcraft
         run: |