Update dependency dompurify to v3.4.15

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
dompurify	3.4.13 → 3.4.15

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Release Notes

cure53/DOMPurify (dompurify)

v3.4.15: DOMPurify 3.4.15

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• Added better clobbering hardening when XML content is involved, thanks @​gnyselcuk
• Added several smaller hardening and edge-case improvements, thanks @​leechristensen
• Bumped several dependencies where possible

v3.4.14: DOMPurify 3.4.14

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• Fixed an issue with possible bypasses when risky tags are allow-listed, thanks @​AlirezaRouhbakhsh
• Fixed a couple of edge cases with mixed document contexts, thanks @​fishjojo1
• Added the SVG pointer-events and vector-effect presentation attributes to the allow-list, thanks @​Jaybhade
• Conducted another refactoring run, removed dead branches and duplicated logic, flattened attribute validation
• Updated the documentation in several spots, README, wiki, etc., thanks @​Akokonunes
• Updated several development dependencies and CI workflow actions

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