API: Community: Fetch from github

Another fix

api/init.sls

 {% set api_domain = "api.ffm.freifunk.net" %}
-{% set api_update_community_command = "(/home/freifunk/update-nodes.sh '/srv/www/{{ api_domain }}/htdocs/ff-frankfurt.json' 2>&1)" %}
+{% set api_update_community_command = "(/home/freifunk/update-nodes.sh \"/srv/www/{{ api_domain }}/htdocs/ff-frankfurt.json\" 2>&1)" %}
 {% set api_community_json = "/var/lib/{{ api_domain }}-community" %}
 
 api_create_srv_www_community_api: