Add retry to snap-store install

For some reason the snap-store install can fail if snap isn't available
fast enough. Adding a retry should fix it.

playbooks/manjaro.yaml

@@ -333,6 +333,8 @@
       name: snap-store
       state: present
     become: yes
+    retries: 6
+    delay: 10
   - name: Install vscode
     community.general.snap:
       name: code