update release list

Author: Remi-Gau

data/timeline.csv

@@ -25,3 +25,4 @@ First BIDS streering group election,2019-09,event,"n/a"
 1.9.0,2023-11,release,https://bids-specification.readthedocs.io/en/v1.9.0
 1.10.0,2024-09,release,https://bids-specification.readthedocs.io/en/v1.10.0
 1.10.1,2025-09,release,https://bids-specification.readthedocs.io/en/v1.10.1
+1.11.0,2026-02,release,https://bids-specification.readthedocs.io/en/v1.11.0