Update batch-parallel-node-tasks.md

As a courtesy, I corrected the single Acrolinx error "alloing" to "allowing" on line 183 of articles/batch/batch-parallel-node-tasks.md.

Author: denrea

articles/batch/batch-parallel-node-tasks.md

@@ -180,7 +180,7 @@ Tasks: 32
 Duration: 00:30:01.4638023
 ```
 
-The second run of the sample shows a significant decrease in job duration. This is because the pool was configured with four tasks per node, alloing for parallel task execution to complete the job in nearly a quarter of the time.
+The second run of the sample shows a significant decrease in job duration. This is because the pool was configured with four tasks per node, allowing for parallel task execution to complete the job in nearly a quarter of the time.
 
 ```
 Nodes: 1