build(deps): bump dompurify and mermaid

Bumps [dompurify](https://github.com/cure53/DOMPurify) to 3.3.0 and updates ancestor dependency [mermaid](https://github.com/mermaid-js/mermaid). These dependencies need to be updated together.


Updates `dompurify` from 3.1.6 to 3.3.0
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@3.1.6...3.3.0)

Updates `mermaid` from 10.9.4 to 10.9.5
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Commits](mermaid-js/mermaid@v10.9.4...v10.9.5)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-version: 3.3.0
  dependency-type: indirect
- dependency-name: mermaid
  dependency-version: 10.9.5
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -645,7 +645,7 @@
     "http-server": "^14.1.1",
     "jest-axe": "^10.0.0",
     "jsdom": "^26.1.0",
-    "mermaid": "^10.9.4",
+    "mermaid": "^10.9.5",
     "next": "^15.0.3",
     "nunjucks": "^3.2.4",
     "playwright": "^1.54.1",