Update README wording

[cmdcolin]

Hi there
This is sort of a silly contribution, but the wording in the README at first glance might make it look like running these eval expressions is somehow "dangerous" e.g. in a js eval type way, but I think this is not the intent

I replaced it with a simple Hello world here just to be a bit more...boring :)

[TomFrost]

Hahaha -- Dangerzone is just another element of the Archer theme that the Readme is written with. I see your point though -- the uninitiated may not take it that way! I wonder if there's an in-theme example that makes more sense...

[cmdcolin]

Lol...the archer thing I always see is the format "Do you want X? Because that's how you get X"

So...

updated PR :)