[stable10] Add migration step to fix birthday claendars#28338

PVince81 merged 1 commit intostable10owncloud/core:stable10from

stable10-6b8b919af0338c288d930eb191f51c7f9b5c3128owncloud/core:stable10-6b8b919af0338c288d930eb191f51c7f9b5c3128Copy head branch name to clipboard