[Aikido] Fix security issue in dompurify via minor version upgrade from 3.4.7 to 3.4.8 in ui

[aikido-autofix]

Upgrade DOMPurify to fix template injection vulnerability allowing script execution through template literals in SAFE_FOR_TEMPLATES mode.

✅ There are no breaking changes

✅ 1 CVE resolved by this upgrade

This PR will resolve the following CVEs:

Issue	Severity	Description
AIKIDO-2026-11156	LOW	[dompurify] A vulnerability allows attackers to inject template expressions (template-literal, mustache, or ERB fragments) into template elements when using specific configuration options, which can be executed as script during downstream template evaluation. The fix ensures expression scrubbing recursively processes template content, similar to shadow-DOM traversal.