Log Message:
www/ruby-rails52: update to 5.2.5

Real changes are in devel/ruby-activestorage52 only.

## Rails 5.2.5 (March 26, 2021) ##

*   Marcel is upgraded to version 1.0.0 to avoid a dependency on GPL-licensed
    mime types data.

    *George Claghorn*

*   The Poppler PDF previewer renders a preview image using the original
    document's crop box rather than its media box, hiding print margins. This
    matches the behavior of the MuPDF previewer.

    *Vincent Robert*