LSC Add 'Update Mechanism:' to README.chromium

Bug: 417367156
Change-Id: I318629733d1f75262e030105ec0b684f1307d2fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6646426
Auto-Submit: Jordan Brown <[email protected]>
Owners-Override: Jordan Brown <[email protected]>
Commit-Queue: Jordan Brown <[email protected]>
Commit-Queue: Jiewei Qian <[email protected]>
Reviewed-by: Jiewei Qian <[email protected]>
Reviewed-by: Rachael Newitt <[email protected]>
Reviewed-by: Joey Scarr <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1475401}
NOKEYCHECK=True
GitOrigin-RevId: da752eb2a3660cf1bf8dac620f6380b89dd953a7
1 file changed