upgrade postfix package from v3.6.6.-r0 to v3.7.2-r0
https://web.archive.org/web/20220529063021/https://www.postfix.org/announcements/postfix-3.7.0.html
https://web.archive.org/web/20220529063033/https://www.postfix.org/announcements/postfix-3.7.1.html
https://web.archive.org/web/20220529063034/https://www.postfix.org/announcements/postfix-3.7.2.html
https://git.alpinelinux.org/aports/commit/main/postfix?h=3.16-stable&id=835c7b41f3aa03ccc98ab51ae1b0f48c0d98669f
https://git.alpinelinux.org/aports/commit/main/postfix?h=3.16-stable&id=b68b25a63bce57882015be069bd7396bf8d0dea4
https://git.alpinelinux.org/aports/commit/main/postfix?h=3.16-stable&id=0ec14a0aecf80235f7029a47ef0e0248d693e652
https://git.alpinelinux.org/aports/commit/main/postfix?h=3.16-stable&id=99efb201d763838f440846ec6f574b3bcc84cd8e