update docker kill step.

deployments/mojobot/mojo.yml

@@ -18,6 +18,6 @@
     shell: cd ~/mojojojo-bot && docker build -t mojo -f docker/dockerfile .
   - name: Check if there are any existing mojo containers running and kill it
     # this has to be a shell because command: isn't interactive
-    shell: docker ps | grep 'mojo' | awk '{print $1}' | xargs docker kill
+    shell: docker ps | grep 'up' | awk '{print $1}' | xargs docker kill
   - name: Run the newly built docker container
     command: docker container run -e "SLACK_BOT_TOKEN={{ VAULT_SLACK_BOT_TOKEN }}" --restart "always" -d mojo