Merge branch 'gupa977e-slurm-constraints' into 'preview'

fix example of constraint

See merge request !774

doc.zih.tu-dresden.de/docs/jobs_and_resources/slurm.md

@@ -501,9 +501,12 @@ as user to specify the requirements. These features should be thought of as chan
 (e.g., a filesystem get stuck on a certain node).
 
 A feature can be used with the Slurm option `-C, --constraint=<ARG>` like
-`srun --constraint=fs_lustre_scratch2 ...` with `srun` or `sbatch`. Combinations like
-`--constraint="fs_beegfs_global0`are allowed. For a detailed description of the possible
-constraints, please refer to the [Slurm documentation](https://slurm.schedmd.com/srun.html).
+`srun --constraint="fs_lustre_scratch2" [...]` with `srun` or `sbatch`.
+
+Multiple features can also be combined using AND, OR, matching OR, resource count etc.
+E.g., `--constraint="fs_beegfs|fs_lustre_ssd"` requests for nodes with at least one of the
+features `fs_beegfs` and `fs_lustre_ssd`. For a detailed description of the possible
+constraints, please refer to the [Slurm documentation](https://slurm.schedmd.com/srun.html#OPT_constraint).
 
 !!! hint