Log Message:
gnucash-docs: update to 4.5.

 4.5    - 28 March 2021
        o Bug 798089 - Starting "Tutorial and Concepts Guide" writes
          namespace error to console
        o Add wiki links about Online Banking Setup
        o Online banking: Table of protocols
        o Rewording of tools abstract
        o Add IDs to all html chunks of help
        o Explain default sort order and a partial review of the register
          view menus.
        o Update links about tax report …
        o New section &quot;Country Specific Reports&quot;<p>Moved \ 
US:TXF,
          added de:ElStEr
        o Report: Join several notes in one footnote
        o Several updates in report-create
        o Guide: New year
        o Update saved-reports location
        o Update copyright year of german guide
        o Specify ISO currencies in overview (English, German)