Fixing parameters in the Timeouts section

- *Fix parameters in foo function call*: `foo` was being called as `foo(a, b, c)`, which doesn't make sense as `a`, `b` and `c` are the parameter names, so I replaced it with `foo(1, 2, 3)` which matches the call above in the same example.

- *Fix interval time in Stacking calls section*: Changed the interval from 1000 to 100 in order to make it match the text which says that 10 calls are stacked during the one second that the function is blocked.