gnucash-on-flatpak master: Revert Alien::LibXML2 to 0.19

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-on-flatpak/commit/8f6dbeb7 (commit)
	from  https://github.com/Gnucash/gnucash-on-flatpak/commit/f57788c0 (commit)



commit 8f6dbeb704c0f5dbf2462e2134742aa2be2e9d69
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon May 26 18:15:23 2025 -0700

    Revert Alien::LibXML2 to 0.19
    
    They went a little wild declaring almost all of libxml 2.11, 12, and 13 unusable.



Summary of changes:
 modules/finance-quote-sources.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)