editors/libreoffice: Update to 7.1.3 release

LibreOffice 7.1.3 Community, the third minor release of the LibreOffice
7.1 family, includes over 100 bug fixes, with 25% focused on
Microsoft Office file compatibility (DOCX, XLSX and PPTX).

Release notes:	https://blog.documentfoundation.org/blog/2021/05/06/libreoffice-7-1-3/