[neon-notifications] Releasing: kcalcore - 5.87.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_kde_kcalcore/10/display/redirect

#<Debian::UScan::DEHS::Package:0x000055df88d9ff40 @name="kcalcore", @debian_uversion="5.86.0", @debian_mangled_uversion="5.86.0", @upstream_version="5.87.0", @upstream_url="http://download.kde.internal.neon.kde.org/stable/frameworks/5.87/kcalendarcore-5.87.0.tar.xz", @status="Newer version available">