fix comment

packages/app/src/server/routes/apiv3/pages.js

@@ -481,7 +481,7 @@ module.exports = (crowi) => {
 
     const isExist = await Page.count({ path: newPagePath }) > 0;
     if (isExist) {
-      // if page found, cannot cannot rename to that path
+      // if page found, cannot rename to that path
       return res.apiv3Err(new ErrorV3(`${newPagePath} already exists`, 'already_exists'), 409);
     }