make sure to dispose worker service when test is done, should fix...

make sure to dispose worker service when test is done, should fix https://github.com/microsoft/vscode/issues/104485

src/vs/editor/contrib/suggest/test/wordDistance.test.ts

@@ -81,11 +81,16 @@ suite('suggest, word distance', function () {
 
 		distance = await WordDistance.create(service, editor);
 
+		disposables.add(service);
 		disposables.add(mode);
 		disposables.add(model);
 		disposables.add(editor);
 	});
 
+	teardown(function () {
+		disposables.clear();
+	});
+
 	function createSuggestItem(label: string, overwriteBefore: number, position: IPosition): CompletionItem {
 		const suggestion: modes.CompletionItem = {
 			label,