CompatHelper: bump compat for Documenter to 0.27, (keep existing compat)#737

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compathelper/new_version/2023-01-28-01-19-16-998-02428767696sefffal/JuliaAstro.github.io:compathelper/new_version/2023-01-28-01-19-16-998-02428767696Copy head branch name to clipboard