Bump dompurify in /functional-samples/ai.gemini-on-device-summarization

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 3.1.7 to 3.2.4.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@3.1.7...3.2.4)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-version: 3.2.4
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

functional-samples/ai.gemini-on-device-summarization/package-lock.json

@@ -13,7 +13,7 @@
     "@mozilla/readability": "0.5.0",
     "@rollup/plugin-commonjs": "28.0.1",
     "@rollup/plugin-node-resolve": "15.3.0",
-    "dompurify": "3.1.7",
+    "dompurify": "3.2.4",
     "marked": "14.1.4",
     "rollup": "4.24.4",
     "rollup-plugin-copy": "^3.5.0"