Mute `utils::download.file()` in `download_fh()`

[salim-b]

Suppresses the output from utils::download.file() in download_fh() when verbose = FALSE.

The suppressed output is:

trying URL 'https://freedomhouse.org/sites/default/files/2023-02/Country_and_Territory_Ratings_and_Statuses_FIW_1973-2023%20.xlsx'
Content type 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' length 208123 bytes (203 KB)
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downloaded 203 KB