bump to error: Can not continue without model info

Author: simon-massa

lua/CopilotChat/client.lua

@@ -259,7 +259,7 @@ function Client:models()
 
         local ok, models_or_err = pcall(provider.get_models, headers_or_err)
         if not ok then
-          log.warn('Failed to fetch models from ' .. provider_name .. ': ' .. models_or_err)
+          log.error('Failed to fetch models from ' .. provider_name .. ': ' .. models_or_err)
           error(models_or_err)
           return {}
         end