[Snyk] Security upgrade html-proofer from 3.18.8 to 3.19.3#4

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soltani59 wants to merge 1 commit intomainfrom

snyk-fix-192d39cf98fc7e06eef1474ba18ca735

Commits on Jul 13, 2025

fix: Gemfile & Gemfile.lock to reduce vulnerabilities
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