docs: update default max parallel tasks per job

Google APIs · copybara-github · commit 4aad61851651 · 2023-10-30T14:00:45.000-07:00
PiperOrigin-RevId: 577948187
diff --git a/google/cloud/batch/v1/job.proto b/google/cloud/batch/v1/job.proto
@@ -549,7 +549,8 @@ message TaskGroup {
   int64 task_count = 4;
 
   // 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.
   int64 parallelism = 5;
 
