Fixes libpng warning for [email protected]

[jszumski]

Summary

Fixes #2667 by converting [email protected] to 8 bit depth

Before:

$ file Stripe/StripeiOS/Resources/Images/[email protected]
Stripe/StripeiOS/Resources/Images/[email protected]: PNG image data, 51 x 51, 1-bit colormap, non-interlaced

After:

$ file Stripe/StripeiOS/Resources/Images/[email protected]
Stripe/StripeiOS/Resources/Images/[email protected]: PNG image data, 51 x 51, 8-bit/color RGBA, non-interlaced

Related: #286

Motivation

Fixes #2667

Testing

The libpng warning no longer appears when rebuilding with the updated file

Changelog

n/a

[wooj-stripe]

Hi @jszumski -

We generally don't accept PRs for binary files, but thank you for the submission. I've submitted a fix for this here with a thank you in our release notes here.

[wooj-stripe]

I am optimistically closing this PR in favor of PR 2758