Fix a mistype that results in a bug

[talsim]

Hello, the first chapter's README ("episode01") - in the "Commands" header, has a little mistype that results in AFL complaining:

PROGRAM ABORT : Multiple -i options not supported
Location : main(), afl-fuzz.c:7804

Please fix it by changing the second option to -o instead of repeating -i 2 times in the following line:

afl-fuzz -i /tmp/in -i /tmp/out ./src/sudo

to:

afl-fuzz -i /tmp/in -o /tmp/out ./src/sudo