docs: update default max parallel tasks per job

PiperOrigin-RevId: 577948187

Source-Link: googleapis/googleapis@4aad618

Source-Link: https://github.com/googleapis/googleapis-gen/commit/8ddd2e612b62ae29a9c32cd648942045bd9b75b6
Copy-Tag: eyJwIjoiYXBpcy9Hb29nbGUuQ2xvdWQuQmF0Y2guVjEvLk93bEJvdC55YW1sIiwiaCI6IjhkZGQyZTYxMmI2MmFlMjlhOWMzMmNkNjQ4OTQyMDQ1YmQ5Yjc1YjYifQ==

apis/Google.Cloud.Batch.V1/Google.Cloud.Batch.V1/Job.g.cs

@@ -5867,7 +5867,8 @@ public long TaskCount {
     private long parallelism_;
     /// <summary>
     /// Max number of tasks that can run in parallel.
-    /// Default to min(task_count, 1000).
+    /// Default to min(task_count, parallel tasks per job limit).
+    /// See: [Job Limits](https://cloud.google.com/batch/quotas#job_limits).
     /// Field parallelism must be 1 if the scheduling_policy is IN_ORDER.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]