databases/redis{,-devel,5}: Update to 6.0.15, 6.2.5, 5.0.13

Release Notes: https://groups.google.com/g/redis-db/c/yU-jQ9BhL24/m/e6iZA2GLBgAJ
Security: CVE-2021-32761

PR: 257326
Approved by: osa (maintainer)
MFH: 2021Q3
Security: c561ce49-eabc-11eb-9c3f-0800270512f4