feat: add multi core job example

Closes #4 (closed)

1_single_core_job/README.md

@@ -31,4 +31,4 @@ The job step with the single task is allocated and performed with the __srun__ c
 #### The python script
 The python script represents the taskt to be done. In this case the task is to print out some environment variables that are set by Slurm.
 
-The environment variable __JOB_ID__ can be used to create temporary files and folders. In this example it creates a file named <JOB_ID>.txt and writes the job name into it.
+The environment variable __JOB_ID__ can be used to create temporary files and folders. In this example it creates a file named _<JOB_ID>_.txt and writes the job name into it.
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