Replaces the zlib URL with the github URL. This allows us to measure the diff between our version and head, for freshness reasons. Bug: 422348588 Change-Id: I6e6b77814550e2a8cbc4aef3f14fc6ef6577abbe Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6966145 Commit-Queue: Rachael Newitt <[email protected]> Reviewed-by: Jiewei Qian <[email protected]> Cr-Commit-Position: refs/heads/main@{#1517733} NOKEYCHECK=True GitOrigin-RevId: d7158f6306806a94608a45d3d4177cd1a16345e6