Add sameAs links to schema markup for enhanced SEO

Author: thibaudgg

source/layouts/layout.erb

@@ -62,7 +62,15 @@
               "@type": "ContactPoint",
               "email": "<%= data.site.contact.email %>",
               "contactType": "customer service"
-            }
+            },
+            "sameAs": [
+              "https://github.com/csa-admin-org",
+              "https://github.com/csa-admin-org/csa-admin",
+              "https://github.com/csa-admin-org/csa-admin.github.io",
+              "https://github.com/acp-admin",
+              "https://github.com/solawi-admin",
+              "<%= data.site.author.website %>"
+            ]
           },
           {
             "@type": "SoftwareApplication",