docs: add pierluigizagaria as a contributor for userTesting

[allcontributors]

Adds @pierluigizagaria as a contributor for userTesting.

This was requested by 34j in this comment

[skip ci]

[34j]

@allcontributors
add Satisfy256 for bug.
add ruckusmattster for bug.
add pierluigizagaria for userTesting.
add heyfixit for docs.
add Desuka-art for bug.

[allcontributors]

@34j

@Satisfy256 already contributed before to bug

@ruckusmattster already contributed before to bug

@pierluigizagaria already contributed before to userTesting

@heyfixit already contributed before to doc

@Desuka-art already contributed before to bug

[34j]

@allcontributors
add Satisfy256 for bug.
add ruckusmattster for bug.
add pierluigizagaria for userTesting.
add heyfixit for docs.
add Desuka-art for bug.

[34j]

@allcontributors
add ruckusmattster for bug
add pierluigizagaria for userTesting
add heyfixit for docs
add Desuka-art for bug

[allcontributors]

@34j

I've put up a pull request to add @Satisfy256! 🎉

I've put up a pull request to add @ruckusmattster! 🎉

We had trouble processing your request. Please try again later.

[allcontributors]

@34j

@ruckusmattster already contributed before to bug

I've put up a pull request to add @pierluigizagaria! 🎉

I've put up a pull request to add @heyfixit! 🎉

We had trouble processing your request. Please try again later.