Fix climatology detection

ESMCollectionTemplate.json

@@ -27,7 +27,7 @@
       {
         "type": "{{ agg.type }}",
         "attribute_name": "{{ agg.attribute_name }}"{% if 'options' in agg %},
-        "options": "{{ agg.options }}"{% endif %}
+        "options": "{{ agg.options | tojson  }}"{% endif %}
       }{% if not loop.last %},{% endif %}
       {% endfor %}]
   }