Release Newsboat 2.31

Lists below only mention user-visible changes, but the full list of contributors
for this release also includes: Sergei Trofimovich and giuliano.

Added
=====

- Operations for scrolling by half a page (`halfpageup`, `halfpagedown`) (#36)
    (Dennis van der Schagt)
- If `--log-level` is specified but `--log-file` isn't, write the log to a file
    named after the template `newsboat_%Y-%m-%d_%H.%M.%S.log`, i.e. use the
    current date and time (Dennis van der Schagt)
- _contrib/move_url.py_ for moving feeds in Newsboat's database while keeping
    articles (blankie)

Changed
=======

- Updated translations: Dutch (Dennis van der Schagt), German (Lysander
    Trischler), Italian (Mauro Scomparin), Polish (Carno), Russian and Ukrainian
    (Alexander Batischev), Spanish (Roboron3042), Turkish (Emir SARI)
- Bumped minimum supported Rust version to 1.64.0

Fixed
=====

- Inability to exit search mode when `quit` is bound to `BACKSPACE` (#2336)
    (Dennis van der Schagt, Alexander Batischev)
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