Fix not being able to disable/enable an extension

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/extensions/extension-loader.ts

@@ -106,7 +106,8 @@ export class ExtensionLoader extends Singleton {
           this.userExtensionsMap.delete(change.oldValue.id);
           break;
         case "update":
-          throw new Error("Extension manifests shouldn't be updated");
+          this.userExtensionsMap.set(change.oldValue.id, change.newValue);
+          break;
       }
     });
   }