adding details of third seminar

web/content/seminar_details.md

 Location: Online using kMeet
 
 Speakers: Remi Kalir (Duke University), Sonja Visser (Hypothes.is), & Janneke Adema (Open Humanities Press)
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+## Seminar 03: TK Labels
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+Date: Thursday 20th March 2025
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+Time: 17:00 CET / 16:00 GMT / 11:00 EST
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+Location: Online using kMeet
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+Speakers: Stephany RunningHawk Johnson (Local Contexts), Corrie Roe (Local Contexts), & Darcy Cullen (UBC Press)