build(deps): bump dompurify from 2.4.7 to 2.5.6 in /client (#3320)

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.4.7 to 2.5.6.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@2.4.7...2.5.6)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

client/package-lock.json

@@ -48,7 +48,7 @@
     "cookieconsent": "^3.1.1",
     "d3": "^7.9.0",
     "dagre-d3-es": "^7.0.10",
-    "dompurify": "^2.4.7",
+    "dompurify": "^2.5.6",
     "dropzone": "^6.0.0-beta.2",
     "file-saver": "^2.0.5",
     "filesize": "^6.4.0",