Rename png test files to be more accurate

After further investigation, the gamma value of this file is 0, not inf,
and it was an implementation bug that took the inverse of this which
caused the skcms_profile object to store inf.
Original files added here https://chromium-review.googlesource.com/c/chromium/src/+/6852156

Change-Id: I0da0191c14a544f42baee2ef6b3991abcc07a1f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6852176
Reviewed-by: Kaylee Lubick <kjlubick@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Daniel Dilan <danieldilan@google.com>
Cr-Commit-Position: refs/heads/main@{#1501963}