Fix mistakes in examples/simple/Readme.md.
Fix mistakes in examples/simple/Readme.md.

1. Delete row for script_arguments.py.
2. Add row for custom_option.py, using script_arguments.py's Description.

Kriechi/mitmproxy,vhaupert/mitmproxy,mhils/mitmproxy,ujjwal96/mitmproxy,cortesi/mitmproxy,cortesi/mitmproxy,cortesi/mitmproxy,mhils/mitmproxy,Kriechi/mitmproxy,MatthewShao/mitmproxy,ujjwal96/mitmproxy,zlorb/mitmproxy,ujjwal96/mitmproxy,Kriechi/mitmproxy,mhils/mitmproxy,mitmproxy/mitmproxy,mitmproxy/mitmproxy,vhaupert/mitmproxy,zlorb/mitmproxy,zlorb/mitmproxy,vhaupert/mitmproxy,zlorb/mitmproxy,vhaupert/mitmproxy,mitmproxy/mitmproxy,MatthewShao/mitmproxy,mitmproxy/mitmproxy,MatthewShao/mitmproxy,mhils/mitmproxy,cortesi/mitmproxy,mhils/mitmproxy,MatthewShao/mitmproxy,ujjwal96/mitmproxy,Kriechi/mitmproxy,mitmproxy/mitmproxy