chore(models): mark MiniMax M3 as open-weighted

Author: patrik-kuehl

models/minimax/MiniMax-M3.toml

@@ -6,7 +6,7 @@ attachment = true
 reasoning = true
 temperature = true
 tool_call = true
-open_weights = false
+open_weights = true
 
 [limit]
 context = 512_000