Upgrade from Chromium 94.0.4606.71 to Chromium 94.0.4606.81.

[mkarolin]

Minor Chromium bump.

https://chromium.googlesource.com/chromium/src/+log/94.0.4606.71..94.0.4606.81?pretty=fuller&n=10000

QA tests:

Check branding items
Check for version bump

Additional checks:

No specific code changes in Brave (only line number changes in patches).

[kjozwiak]

Closing as this was merged into 1.31.x & 1.30.x 👍