Bumps [jakarta.mail:jakarta.mail-api](https://github.com/jakartaee/mail-api) from 2.1.4 to 2.1.5.

• e187321 Prepare release jakarta.mail:jakarta.mail-api:2.1.5
• ef7483e Revert "Multipart performs blocking call in every instantiation #699 (#716)"
• abe990f Reviews changes
• a10a173 Improve MimeMessage UTF8 handling
• 7a53112 Improve MimeMessage UTF8 handling
• 1736520 Drop references to the Reference implementation
• f2e6da3 Bump nokogiri from 1.16.5 to 1.18.9 in /www
• 5488a7c #708 Add missing javadoc for supporting ServiceLoader mechanism (#726)
• ccbe84b Bump webrick from 1.8.1 to 1.8.2 in /www
• 34f8e9b ISSUE-721 - add full Markdown for URLs since Jekyll action doesn't autolink t...
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