adjust to the current sstWriter syntax

Author: guj

docs/user_guide/source/tutorials/sst.rst

@@ -25,15 +25,15 @@ SST Engine Example:
 *************** 
     - add option **"--network=single_node_vni,job_vni"**
     - working example:
-        - srun -n 5 -N 1  --network=single_node_vni,job_vni writer > wout 2>&1 &
+        - srun -n 5 -N 1  --network=single_node_vni,job_vni writer RDMA > wout 2>&1 &
         - srun -n 2 -N 1  --network=single_node_vni,job_vni reader > rout 2>&1 &
 
 3. MPI
 ***************
  - needs 2+ nodes on server
  - add option **"--network=single_node_vni,job_vni"**
  - working example: 
-      - srun -n 2 -N 2 --network=single_node_vni,job_vni writer > wout 2>&1 &
+      - srun -n 2 -N 2 --network=single_node_vni,job_vni writer MPI > wout 2>&1 &
       - srun -n 2 -N 2 --network=single_node_vni,job_vni reader > rout 2>&1 &
 
 4. UCX
@@ -47,7 +47,7 @@ SST Engine Example:
             - cray-ucx/2.7.0-1
        -  (May 2025) compile ADIOS (with ucx), cmake linked to a non exist ucx installation. To work around, change CMakeCache.txt and force to use /opt/cray/pe/cray-ucx/2.7.0-1/ucx instead of the wrong path. 
        - 1 Node works (as of May 2025)
-            - srun -N 1 -n 2 ./adios2_hello_bpWriter_mpi  
+            - srun -N 1 -n 2 ./adios2_hello_bpWriter_mpi
        - 2 Node failed (as of May 2025)
             - MPIDI_UCX_mpi_init_hook(139):  ucx function returned with failed status(ucx_init.c 139 MPIDI_UCX_mpi_init_hook Destination is unreachable)