gnucash-docs: New annotated tag '5.12'

[John Ralls]

        at  https://github.com/Gnucash/gnucash-docs/tree/0e9249b166dfc7d69014b750c5139b5f177f004f (tag)
   tagging  c6eaca058d8bc0d2e5780099f463dfb1b5a683bb (commit)
  replaces  5.11
 tagged by  John Ralls
        on  Sat Jun 28 14:51:33 2025 -0700


Release Documentation for GnuCash 5.12

Christian Wehling (2):
      de:manual: Remove Finance::Quote appendix
      de:manual:ch_Customize: Better description for 'Day Threshold Read-Only

John Ralls (6):
      Merge Christian Wehling's 'de_FQ' into stable.
      Merge Thomas Kriegel's 'German Corrections' into stable.
      Merge KONR4D1U5's 'typo-fix-1' into stable.
      Merge K0NRAD1U5's 'typo-fix-2' into stable.
      Merge Christian Wehling's 'de_book-options' of github.com:CWehli/gnucash-docs into stable
      Release Documentation for GnuCash 5.12.

K0NR4D1U5 (2):
      Update ch_basics.docbook
      missing space :)

Thomas (2):
      Update ch_import_business_data.docbook
      Update ch_import_business_data.docbook