mail/getmail6: update to 6.19.10

Changelog:

• https://github.com/getmail6/getmail6/releases/tag/v6.19.09
• https://github.com/getmail6/getmail6/releases/tag/v6.19.10

• Fix get_code in getmail-gmail-xoauth-tokens (#248, garylin/patch-1)
• Unhandled Exception for SimpleIMAPSSLRetriever when password contains non-ascii chars (#244)
• fix #247: Faulty error messages "server does not support IDLE"
• fix #243: KeyError: "code" -> Google approval URL format has changed
• Python 3.14 related fixes (#242, meeuw/python3.14)
• fix MacOS issue #250 forcing fork method in multiprocessing

PR: 289571
Reported by: Michael Büker <freebsd@michael-bueker.de> (maintainer)