[doc/um] Updated the python requirements run command for sw simple system
[doc/um] Updated the python requirements run command for sw simple system

Signed-off-by: Rahul Raveendran <8e170d5f0097daa106b5a1759aaa92c38b764953@acconeer.com>

lowRISC/ibex,lowRISC/ibex,lowRISC/ibex,AmbiML/ibex,lowRISC/ibex,AmbiML/ibex,AmbiML/ibex,AmbiML/ibex