Update part13a.md

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Author: hanasiu

src/content/13/en/part13a.md

@@ -521,7 +521,7 @@ The name of the corresponding column in the database would be <i>creation_year</
 
 We have also defined <i>modelName: 'note'</i>, the default "model name" would be capitalized <i>Note</i>. However we want to have a lowercase initial, it will make a few things a bit more convenient going forward.
 
-The database operation is easy to do using the [query interface](https://sequelize.org/master/manual/model-querying-basics.html) provided by models, the method [findAll](https://sequelize.org/master/class/lib/model.js~Model.html#static-method-findAll) works exactly as it is assumed by it's name to work:
+The database operation is easy to do using the [query interface](https://sequelize.org/master/manual/model-querying-basics.html) provided by models, the method [findAll](https://sequelize.org/api/v6/class/src/model.js~model#static-method-findAll) works exactly as it is assumed by it's name to work:
 
 ```js
 app.get('/api/notes', async (req, res) => {