Update heartbeat format regarding environments

tasks/heartbeat.yml

@@ -4,6 +4,6 @@
 - name: Crontab for heartbeat
   cron:
     name: Heartbeat
-    job: '/usr/bin/curl -XPOST {{ netdata_alerta_webhook }}/heartbeat -H ''Authorization: Key {{ netdata_alerta_apikey }}'' -H ''Content-type: application/json'' -d ''{"origin":"{{ inventory_hostname }}","timeout":120,"tags":["environment:{{ netdata_alerta_environment|default(''production'') }}"]}'' >/dev/null 2>&1'
+    job: '/usr/bin/curl -XPOST {{ netdata_alerta_webhook }}/heartbeat -H ''Authorization: Key {{ netdata_alerta_apikey }}'' -H ''Content-type: application/json'' -d ''{"origin":"{{ inventory_hostname }}","timeout":120,"attributes":{"environment":"{{ netdata_alerta_environment|default(''production'') }}"}}'' >/dev/null 2>&1'
   tags:
     - cron