Bump dompurify from 3.1.7 to 3.2.4 in /src/frontend (#9083)

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

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

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

src/frontend/yarn.lock

@@ -2136,7 +2136,7 @@
   dependencies:
     "@types/estree" "*"
 
-"@types/trusted-types@*":
+"@types/trusted-types@*", "@types/trusted-types@^2.0.7":
   version "2.0.7"
   resolved "https://registry.yarnpkg.com/@types/trusted-types/-/trusted-types-2.0.7.tgz#baccb07a970b91707df3a3e8ba6896c57ead2d11"
   integrity sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==
@@ -2896,10 +2896,12 @@ dom-helpers@^5.0.1:
     "@babel/runtime" "^7.8.7"
     csstype "^3.0.2"
 
-dompurify@^3.1.7:
-  version "3.1.7"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-3.1.7.tgz#711a8c96479fb6ced93453732c160c3c72418a6a"
-  integrity sha512-VaTstWtsneJY8xzy7DekmYWEOZcmzIe3Qb3zPd4STve1OBTa+e+WmS1ITQec1fZYXI3HCsOZZiSMpG6oxoWMWQ==
+dompurify@^3.2.4:
+  version "3.2.4"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-3.2.4.tgz#af5a5a11407524431456cf18836c55d13441cd8e"
+  integrity sha512-ysFSFEDVduQpyhzAob/kkuJjf5zWkZD8/A9ywSp1byueyuCfHamrCBa14/Oc2iiB0e51B+NpxSl5gmzn+Ms/mg==
+  optionalDependencies:
+    "@types/trusted-types" "^2.0.7"
 
 easymde@^2.18.0:
   version "2.18.0"