Added link to first IETF WG meeting

Author: glpatcern

HISTORY.md

@@ -48,3 +48,4 @@ The Open Cloud Mesh initiative started in 2015 within the [GÉANT Association](h
 ### [Sovereign Tech](https://www.sovereign.tech) funded efforts
 * In October 2025 a [grant was awarded](https://www.sovereign.tech/programs/fund) with a set of milestones to implement several missing pieces and introduce automated testing in each vendor's CI pipeline, as well as to support the IETF standardization efforts. This engagement was first made public at the [Open Source at CERN in 2025/2026 event](https://indico.cern.ch/event/1546072), featuring a number of funding agencies including Sovereign Tech, with a [lightning talk](https://indico.cern.ch/event/1546072/contributions/6754920) about CERNBox and OCM.
 * Presentations and demonstrations about the OCM-based EOSC Federation of Cloud Storage Systems at the [EOSC Symposium 2025](https://indico.cern.ch/event/1543880/timetable).
+* First [IETF WG interim meeting](https://datatracker.ietf.org/doc/agenda-interim-2025-ocm-01-ocm-01) held in November 2025: the draft is officially adopted by the WG.