Add a forgotten file in Makefile. Related to commit [23705].

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash-docs/trunk@23731 57a11ea4-9604-0410-9ed3-97b8803252fd
Adapt migration documentation to gsettings introduction

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash-docs/trunk@23764 57a11ea4-9604-0410-9ed3-97b8803252fd
First documention updates for credit notes

This commit partly implements feature request 687477

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash-docs/trunk@23765 57a11ea4-9604-0410-9ed3-97b8803252fd
Release 2.6.1

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash-docs/trunk@23771 57a11ea4-9604-0410-9ed3-97b8803252fd
Merge branch 'master' of https://github.com/Gnucash/gnucash-docs into trunk
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