chore(deps-dev): bump vscode-extension-tester from 8.26.1 to 8.27.0 - #276

On November 2, 2026, GitHub will restrict `pull_request_target` on public repositories by default. To continue allowing the event trigger, configure an Actions policy. Learn more: https://gh.io/securely-using-pull_request_target#default-policy-for-pull_request_target