build(deps): bump dompurify and @types/dompurify

Bumps [dompurify](https://github.com/cure53/DOMPurify) and [@types/dompurify](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/dompurify). These dependencies needed to be updated together.

Updates `dompurify` from 2.3.4 to 3.2.7
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@2.3.4...3.2.7)

Updates `@types/dompurify` from 2.3.2 to 3.2.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/dompurify)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-version: 3.2.7
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/dompurify"
  dependency-version: 3.2.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -20,7 +20,7 @@
     "classnames": "^2.2.6",
     "color": "^4.1.0",
     "color-string": "^1.9.0",
-    "dompurify": "2.3.4",
+    "dompurify": "3.2.7",
     "dotenv": "^10.0.0",
     "gatsby": "^3.14.6",
     "gatsby-plugin-canonical-urls": "^3.14.0",
@@ -94,7 +94,7 @@
     "@types/classnames": "^2.3.1",
     "@types/color": "^3.0.2",
     "@types/color-string": "^1.5.2",
-    "@types/dompurify": "^2.3.2",
+    "@types/dompurify": "^3.2.0",
     "@types/jest": "^27.0.3",
     "@types/react-dom": "^17.0.10",
     "@types/react-helmet": "6.1.5",