docs(run): fix run helloworld instructions

[grant]

Fixes cd path for sample to work properly.

Fixes #1204

[grayside]

Per request from @bshaffer this command assumes a starting working directory of the directory from where you would have run git clone. I have no opinion either way.

[grant]

Thanks for the background.

IMO we should please state that assumption then. Or state the cd right after the git clone step.

If a user is linked to this README, the instructions will not work. Usually READMEs are self-isolated and expect you run commands from the directory you're reading the README in.

[bshaffer]

@grant If we include instructions on cloning the repo, we include instructions on changing directory into the repo. This is consistent with all of our tutorials.

If you'd like, split up cd php-docs-samples/run into the previous step where the repo is cloned. This should be clear to everyone.

[grant]

If you'd like, split up cd php-docs-samples/run into the previous step where the repo is cloned. This should be clear to everyone.

Yeah, that's what I'd suggest.

[bshaffer]

This looks good but you'll need to merge master for it to pass the tests

[grant]

Sure. Rebased.