Bump dompurify from 2.3.0 to 2.3.1

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.3.0...2.3.1)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -14,7 +14,7 @@
         "@fortawesome/vue-fontawesome": "^3.0.0-4",
         "core-js": "^3.16.1",
         "css-loader": "^6.2.0",
-        "dompurify": "^2.3.0",
+        "dompurify": "^2.3.1",
         "hotkeys-js": "^3.8.7",
         "javascript-time-ago": "^2.3.8",
         "mux.js": "^5.12.2",