www/kanboard: update to 1.2.39

ChangeLog: https://github.com/kanboard/kanboard/releases/tag/v1.2.39

• fix: remove CSS which caused responsive issues on mobile
• fix: incorrect template condition that set the username field to read only for remote users
• fix: tasks count across swimlanes was incorrect
• fix: avoid warning from libpng when loading PNG image with incorrect iCCP profiles
• feat: improve column header task counts
• feat: add apple-mobile-web-app-capable meta tag
• build(deps): bump symfony/finder from 5.4.40 to 5.4.42

ChangeLog: https://github.com/kanboard/kanboard/releases/tag/v1.2.38

• fix: avoid browser caching issue when showing file attachments
• fix: comments visibility was not taken into consideration on event activities page
• fix: send comment via email was broken due to missing comment visibility logic implemented in v1.2.36
• feat(locale): update Greek translations
• feat(locale): update Italian translations
• build(deps): bump symfony/console from 5.4.40 to 5.4.41
• build(deps): bump docker/build-push-action from 5 to 6

Reported by: portscout