devel/tree-sitter-cli: Update to 0.26.9

Changelog: https://github.com/tree-sitter/tree-sitter/compare/v0.25.8...v0.26.8

While here update port maintainer email address per request.

PR: 294982
Approved by: 0mp (mentor)
Differential Revision: https://reviews.freebsd.org/D57205