fix: Fix external provider support (#726)

scripts/modules/task-manager/models.js

@@ -525,7 +525,7 @@ async function setModel(role, modelId, options = {}) {
 					success: false,
 					error: {
 						code: 'MODEL_NOT_FOUND_NO_HINT',
-						message: `Model ID "${modelId}" not found in Taskmaster's supported models. If this is a custom model, please specify the provider using --openrouter or --ollama.`
+						message: `Model ID "${modelId}" not found in Taskmaster's supported models. If this is a custom model, please specify the provider using --openrouter, --ollama, --bedrock, --azure, or --vertex.`
 					}
 				};
 			}