devel/libbson: Update 1.30.4 => 1.30.7

Changelogs:
https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.5
https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.6
https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.7

PR: 293865
Reported by: Krzysztof <ports@bsdserwis.com> (maintainer)
Approved by: maintainer, vvd (mentor)
MFH: 2026Q1 (after 1 week)

(cherry picked from commit 7950638b3cb320795af78e0b7a82d81b01cac835)