Update release-policy.md

Author: amyblais

source/product-overview/release-policy.md

@@ -52,10 +52,11 @@ gantt
     v10.9                  :done, 2025-06-16, 2025-09-15
     v10.10                 :done, 2025-07-16, 2025-10-15
     v10.11 & Desktop App v5.13 Extended Support :crit,    2025-08-16, 2026-08-15
-    v10.12                 :active, 2025-09-16, 2025-12-15
+    v10.12                 :done, 2025-09-16, 2025-12-15
     v11.0                  :active, 2025-10-16, 2026-01-15
     v11.1                  :active, 2025-11-14, 2026-02-15
     v11.2                  :active, 2025-12-16, 2026-03-15
+    v11.3                  :active, 2026-01-16, 2026-04-15
 ```
 
 **Timeline Legend:**