fix: use lit-ssr html function

Author: bennypowers

tools/pfe-tools/ssr/ssr.ts

@@ -1,9 +1,9 @@
-import { render } from '@lit-labs/ssr';
+import { render, html } from '@lit-labs/ssr';
 import { collectResult } from '@lit-labs/ssr/lib/render-result.js';
-import { html } from 'lit';
 import { unsafeHTML } from 'lit/directives/unsafe-html.js';
 
 /**
+ * composes the `unsafeHTML`, `html`, `render`, and `collectResult` functions from lit ssr
  * @param input html partial
  */
 export async function ssr(input: string): Promise<string> {