Log Message:
gnucash-docs: update to 5.6.

 5.6   - 31 March 2024
       o Bug 799237 - Dead Link
       o C, de:Manual:Finance-Quote: Note about Expected Time Commitment
       o C, de:Manual:Finance-Quote: Tip about 'gnc-fq-update: Command not
         found'
       o docbook: gnc-gui-de: Improve accelerator of menuitems
       o Link https://wiki.gnucash.org/wiki/Documentation_Translation#The_Procedure
         in recent gnc-gui-*.dtd files
       o Replace *dquote entities by <quote> tags
       o C:Manual:Tools:Unify main section titles and other minor improvements
       o Unify filename extension
       o C:Manual:CSV Import: show icons
       o xmlformat: Apply changes at the element 'screeninfo'
       o xmlformat.conf: new element 'screeninfo' with no entry- and no
         exit-break