Improve wording

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

@@ -15,7 +15,7 @@ Colleagues of ZIH have found that some MPI-IO access patterns suffer a significa
 using `OMPIO` as MPI-IO module with `OpenMPI/4.1.x` modules on ZIH systems. At the moment, the root
 cause is unclear and needs further investigation.
 
-**A workaround** for this performance loss is to use "old", i.e., `ROMIO` MPI-IO-module. This
+**A workaround** for this performance loss is to use the "old", i.e., `ROMIO` MPI-IO-module. This
 is achieved by setting the environment variable `OMPI_MCA_io` before executing the application as
 follows