Adapt to math-comp/math-comp#1237 · math-comp/Abel@89543be

The following actions uses Node.js version which is deprecated and will be forced to run on node20: actions/checkout@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Reference size_Xn_sub_1 is deprecated since mathcomp 2.3.0.

Reference size_Xn_sub_1 is deprecated since mathcomp 2.3.0.

Reference size_Xn_sub_1 is deprecated since mathcomp 2.3.0.

Notation rolle is deprecated since mathcomp-real-closed 2.1.0.

p_neq0 is declared opaque (Qed) but this is not fully respected

ratr_p' is declared opaque (Qed) but this is not fully respected

rp'_uniq is declared opaque (Qed) but this is not fully respected

rp_perm is declared opaque (Qed) but this is not fully respected

rp_uniq is declared opaque (Qed) but this is not fully respected

ratr_p is declared opaque (Qed) but this is not fully respected

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