Update slurm

challenges/slurm/example2/HelloWorld.sh

+#!/bin/bash
+
+echo "Hello World! Node:${SLURMD_NODENAME} Core:${SLURM_PROCID}"

challenges/slurm/example2/ex2_job_script.sbatch

+#!/bin/bash
+
+#SBATCH -A <account_name>
+#SBATCH -p <partition_name>
+#SBATCH -N 2
+#SBATCH -n 4
+#SBATCH -c 1
+#SBATCH --ntasks-per-node=2
+#SBATCH -J multithread-test-job
+#SBATCH --mem=1g
+#SBATCH -t 10:00
+#SBATCH -o ./%j-multithread-output.txt
+#SBATCH -e ./%j-multithread-error.txt
+#SBATCH --mail-type=FAIL
+#SBATCH --mail-user=<your_email>
+
+srun ./HelloWorld.sh