Update docusaurus.config.js (#434)

fix(config): update edit url so that "Edit this page" links are prepended with "edit/master" so that they resolve to the appropriate edit page

docusaurus.config.js

@@ -43,7 +43,7 @@ const config = {
           sidebarPath: require.resolve("./sidebars.js"),
           // Please change this to your repo.
           // Remove this to remove the "edit this page" links.
-          editUrl: "https://github.com/dappnode/DappnodeDocs/tree/master",
+          editUrl: "https://github.com/dappnode/DappnodeDocs/edit/master",
         },
         theme: {
           customCss: require.resolve("./src/css/custom.css"),