ci: Reroute setup-texlive-action

[YDX-2147483647]

Resolves #680

[Copilot]

Pull Request Overview

Updates the GitHub Actions workflow to use the official TeX-Live organization's setup-texlive-action instead of the teatimeguest fork, addressing issue #680. This change ensures the project uses the canonical source for the TeX Live setup action.

• Rerouted setup-texlive-action from teatimeguest/setup-texlive-action@v3 to TeX-Live/setup-texlive-action@v3
• Added explcheck ignore rule for unused private functions

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
.github/workflows/test.yaml	Updated two instances of setup-texlive-action to use official TeX-Live organization
.github/workflows/release.yml	Updated setup-texlive-action to use official TeX-Live organization
.explcheckrc	Added ignore rule W401 for unused private function warnings

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