Bump dompurify from 2.4.5 to 2.5.6

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.4.5 to 2.5.6.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@2.4.5...2.5.6)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-type: indirect
...

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

yarn.lock

@@ -5096,9 +5096,9 @@ domhandler@^5.0.2, domhandler@^5.0.3:
     domelementtype "^2.3.0"
 
 dompurify@^2.2.6, dompurify@^2.2.9:
-  version "2.4.5"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.4.5.tgz#0e89a27601f0bad978f9a924e7a05d5d2cccdd87"
-  integrity sha512-jggCCd+8Iqp4Tsz0nIvpcb22InKEBrGz5dw3EQJMs8HPJDsKbFIO3STYtAvCfDx26Muevn1MHVI0XxjgFfmiSA==
+  version "2.5.6"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.5.6.tgz#8402b501611eaa7fb3786072297fcbe2787f8592"
+  integrity sha512-zUTaUBO8pY4+iJMPE1B9XlO2tXVYIcEA4SNGtvDELzTSCQO7RzH+j7S180BmhmJId78lqGU2z19vgVx2Sxs/PQ==
 
 domutils@^1.7.0:
   version "1.7.0"