Fix rel type

src/_includes/layout.11ty.js

@@ -121,7 +121,7 @@ exports.render = async function (data) {
     id: "author-outer",
     innerId: "author"
   })}
-      ${this.license("cc-by-nc-sa", "4.0", "license", true)}
+      ${this.license("cc-by-nc-sa", "4.0", null, "license", true)}
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