Release 2.5.0

[kelson42]

• Merge/apply latest translations from Translatewiki
• Check if library dependencies version check has been updated
• CI is green on git main
• Kiwix-Build is OK
• Check if Flathub metadata are updated (version, date) at org.kiwix.desktop.appdata.xml, don't forget changelog and screenshots!
• Update the Changelog
• Update version
• Create a tag on git
• Secure new sources/binaries are published on https://download.kiwix.org/release/kiwix-desktop
• Test Windows binaries work fine
• Test Linux binaries work fine
• Update the GitHub release with the Changelog
• Create new empty entry in Changelog (placeholder for future entries)
• Close current milestone and create new one incrementally (a priori a minor version)
• Publicize these new versions
• Open a ticket at imager-service in order to include the new version in hotspots