only add trailing slash on plugin pages

fixes that the trailing slash would have been added to the root and browser-usage.html as well

scripts/docs/processors/jekyll.js

@@ -22,7 +22,10 @@ module.exports = function jekyll(renderDocsProcessor) {
         doc.URL = doc.outputPath.replace('docs//', 'docs/')
           .replace('/index.md', '')
           .replace('content/', '');
-        doc.URL = doc.URL+'/'; // add trailing slash
+        // add trailing slash to plugin pages
+        if(!doc.URL.endsWith("/") && !doc.URL.endsWith(".html")) {
+          doc.URL = doc.URL+'/'; 
+        }
       });
 
       const betaDocs = [];