chore: Update ha-nunjucks to 1.6.2 (#2549)

- Replaces:
https://github.com/dermotduffy/advanced-camera-card/pull/2515

tests/card-controller/templates/index.test.ts

@@ -1,9 +1,19 @@
-import { describe, expect, it, vi } from 'vitest';
+import { beforeAll, describe, expect, it, vi } from 'vitest';
 
 import { TemplateManager } from '../../../src/card-controller/templates/index';
-import { createConfig, createHASS, createStateEntity } from '../../test-utils';
+import {
+  createConfig,
+  createHASS,
+  createStateEntity,
+  stubConnectedHomeAssistant,
+} from '../../test-utils';
 
+// ha-nunjucks reads `window`/`document` at import and renders via a
+// `window.haNunjucks` global, so the renderer needs a DOM environment.
+// @vitest-environment jsdom
 describe('TemplateManager', () => {
+  beforeAll(() => stubConnectedHomeAssistant());
+
   describe('loadRenderer', () => {
     it('should render a template raw before the engine is loaded', () => {
       const manager = new TemplateManager();