Fix edit docs link

Author: AlexGodbehere

docusaurus.config.js

@@ -61,7 +61,7 @@ const config = {
                     // Please change this to your repo.
                     // Remove this to remove the "edit this page" links.
                     editUrl:
-                        'https://github.com/AMRC-Factoryplus/documentation',
+                        'https://github.com/AMRC-Factoryplus/documentation/tree/main',
                 },
                 theme: {
                     customCss: require.resolve('./src/css/custom.css'),