[Koha] Koha 21.05.15 release

The Koha community is pleased to announce the release of version 21.05.15. For full release notes, please visit https://koha-community.org/koha-version-21-05-15-released/ Thanks! -- Andrew Fuerste-Henry Educator (he/they) ByWater Solutions bywatersolutions.com Phone:(888)900-8944 <(888)%20900-8944> What is Koha? <http://bywatersolutions.com/what-is-koha/>