Fix the mistake

data/projects.liquid

@@ -14,7 +14,7 @@
 "initiatives" :  [{% for initiative in post.initiatives %} "{{ initiative }}" {% unless forloop.last %},{% endunless %}{% endfor %}],
 "tags" :  [{% for tag in post.tags %} "{{ tag }}"{% unless forloop.last %},{% endunless %}{% endfor %}],
 "collaborating_projects" : [{% for cp in post.collaborating_projects %}"{{ cp }}"{% unless forloop.last %},{% endunless %}{% endfor %}],
-"content_url" : "{{site.base_url}}{{post.url}}",
+"content_url" : "{{ post.url | remove_first:'/'}}",
 "path" : "{{post.path}}",
 "status" : [{% for status in post.status %} "{{ status }}" {% unless forloop.last %},{% endunless %}{% endfor %}],
 "markdown" : "{{post.path | replace: '_projects/',''}}"