add web extensions title

release-notes/v1_65.md

@@ -418,6 +418,8 @@ The new [Java GUI Applications](https://code.visualstudio.com/docs/java/java-gui
 
 Last but certainly not least, a big _**Thank You**_ to the contributors of VS Code.
 
+### Web extensions
+
 Extension authors for enabling extensions that run code as [web extensions](https://code.visualstudio.com/api/extension-guides/web-extensions) (the list below is between February 1 2022 and February 28 2022):
 
 * [Var Style](https://marketplace.visualstudio.com/items?itemName=allen.VarStyle) ([allen](https://marketplace.visualstudio.com/publishers/allen))