Update GitHub URL

docusaurus.config.js

@@ -38,7 +38,7 @@ const config = {
           // Please change this to your repo.
           // Remove this to remove the "edit this page" links.
           editUrl:
-            "https://github.com/facebook/docusaurus/tree/main/packages/create-docusaurus/templates/shared/",
+            "https://github.com/waku-org/waku.guide/tree/staging/",
         },
         theme: {
           customCss: require.resolve("./src/css/custom.css"),