www/adjuster: Update 3.246 => 3.248
Commit log:
https://github.com/ssb22/adjuster/compare/v3.246...v3.248
PR: 294940
Reported by: Silas S. Brown <ssb22@cam.ac.uk> (maintainer)
Approved by: vvd (co-mentor, implicit)
MFH: 2026Q2
(cherry picked from commit 639507ce8d53aaaa8f1ef6e3c7ee84206e4ee72f)