Add 2026 CF Workshop details and announcement link

Author: cofinoa

Meetings/index.md

@@ -8,6 +8,7 @@ group: "navigation"
 
 ## Annual CF Workshops
 
+* 2026 CF Workshop - 21-24 September 2026 - ECMWF - Bologna (Italy) - Hybrid Workshop - [Follow discussion][2026-announcement]
 * [2025 CF Workshop][2025] - 22-25 September 2025 - Virtual Workshop
 * [2024 CF Workshop][2024] - 17-20 September 2024 - SMHI - Norrköping (Sweden)
 * [2023 CF Workshop][2023] - 3-5 October 2023 - Virtual Workshop
@@ -19,6 +20,7 @@ group: "navigation"
 * [2017 Advancing netCDF-CF Workshop][2017] - 6-8 September 2017 - EarthCube - Boulder, CO (USA)
 * [2016 Advancing netCDF-CF Workshop for the Geosciences][2016] - 24-26 May 2016 - EarthCube - Boulder, CO (USA)
 
+[2026-announcement]: https://github.com/orgs/cf-convention/discussions/472
 [2025]: 2025-Workshop.md
 [2024]: 2024-Workshop.md
 [2023]: 2023-Workshop.md