log the prefix task id since its more user readable

src/main.ts

@@ -101,7 +101,8 @@ async function getRemoteBuilderAddr(inputs: context.Inputs): Promise<string | nu
 
     const data = response.data;
     const taskId = data['id'] as string;
-    core.info(`Submitted build task: ${taskId}`);
+    const prefixTaskId = data['prefix_id'] as string;
+    core.info(`Submitted build task: ${prefixTaskId}`);
     stateHelper.setBlacksmithBuildTaskId(taskId);
     const clientKey = data['client_key'] as string;
     stateHelper.setBlacksmithClientKey(clientKey);