2026-01-16 release

What's Changed

• Add "bar" unit to UO by @matentzn in #90
• Add microgram per square centimeter unit class by @matentzn in #91
• Use IAO:0000115 for definitions instead of rdfs:comment by @matentzn in #92
• Update release files by @matentzn in #93

Full Changelog: v2026-01-09...v2026-01-16