Old spec link 404s in footer

Author: tcope25

site/_core/Site.js

@@ -82,7 +82,7 @@ export default ({ page, category, title, section, className, noSearch, children
           </div>
           <div>
             <h5>More</h5>
-            <a href="https://facebook.github.io/graphql/" target="_blank" rel="noopener noreferrer">GraphQL Specification</a>
+            <a href="https://graphql.github.io/graphql-spec/" target="_blank" rel="noopener noreferrer">GraphQL Specification</a>
             <a href="https://foundation.graphql.org/" target="_blank" rel="noopener noreferrer">GraphQL Foundation</a>
             <a href="https://github.com/graphql" target="_blank" rel="noopener noreferrer">GraphQL GitHub</a>
             {page && <a href={'https://github.com/graphql/graphql.github.io/edit/source/site/' + page.relPath} target="_blank" rel="noopener noreferrer">Edit this page &#x270E;</a>}