Bump dompurify from 3.3.2 to 3.4.0 in /welcome

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 3.3.2 to 3.4.0.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@3.3.2...3.4.0)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-version: 3.4.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

welcome/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@surfnet/sds": "^0.0.162",
-    "dompurify": "^3.3.2",
+    "dompurify": "^3.4.0",
     "i18n-js": "^4.5.3",
     "isomorphic-dompurify": "^3.0.0",
     "js-cookie": "^3.0.5",

welcome/yarn.lock

@@ -1475,10 +1475,10 @@ dom-accessibility-api@^0.6.3:
   resolved "https://registry.yarnpkg.com/dom-accessibility-api/-/dom-accessibility-api-0.6.3.tgz#993e925cc1d73f2c662e7d75dd5a5445259a8fd8"
   integrity sha512-7ZgogeTnjuHbo+ct10G9Ffp0mif17idi0IyWNVA/wcwcm7NPOD/WEHVP3n7n3MhXqxoIYm8d6MuZohYWIZ4T3w==
 
-dompurify@^3.3.1, dompurify@^3.3.2:
-  version "3.3.2"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-3.3.2.tgz#58c515d0f8508b8749452a028aa589ad80b36325"
-  integrity sha512-6obghkliLdmKa56xdbLOpUZ43pAR6xFy1uOrxBaIDjT+yaRuuybLjGS9eVBoSR/UPU5fq3OXClEHLJNGvbxKpQ==
+dompurify@^3.3.1, dompurify@^3.4.0:
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-3.4.0.tgz#b1fc33ebdadb373241621e0a30e4ad81573dfd0b"
+  integrity sha512-nolgK9JcaUXMSmW+j1yaSvaEaoXYHwWyGJlkoCTghc97KgGDDSnpoU/PlEnw63Ah+TGKFOyY+X5LnxaWbCSfXg==
   optionalDependencies:
     "@types/trusted-types" "^2.0.7"