Update README.md - running Sup from Supfile
Update README.md - running Sup from Supfile

using "run" will try to execute sup on the Destination network (machines) while according to documentation authors intent I assume it was meant to run it locally per sub folder project. hence replaced run with 'local' which worked for me.
pressly/stackup,pressly/sup,pressly/stackup,pxue/sup,pxue/sup,pressly/sup