fix README.multinode to match new configure options

Author: npe9

README.multinode

@@ -7,7 +7,6 @@ Configuring and Building
 ------------------------
 
     ./configure --enable-multinode \
-                --with-multinode-runtime={mpi,pmi,shmemrt}
                 --with-portals4[=DIR]
                 [...]
     make
@@ -33,9 +32,9 @@ Launching with SLURM and `pmi`:
     Hello from locale 004!
     Hello from locale 002!
 
-Launching with YOD (provided with Portals4) and `shmemrt`:
+Launching with YOD (provided with Portals4):
 
-    env VERBOSE=1 yod -c 4 hello_world
+    env VERBOSE=1 yod.hydra -c 4 hello_world
     Hello from locale 003!
     Hello from locale 001!
     Hello from locale 004!