[ssci] Add Shipped field to READMEs

This CL adds the Shipped field and updates the
License File field in Chromium READMEs within the
directory /third_party/six.

See the LSC doc at go/lsc-chrome-metadata.

This CL was uploaded by git cl split.

R=tiborg@chromium.org

Bug: b:285450740
Change-Id: I1310e4662d4ba3dba9c1dd6913031e1502bb3694
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4664168
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Anne Redulla <aredulla@google.com>
Cr-Commit-Position: refs/heads/main@{#1168463}
NOKEYCHECK=True
GitOrigin-RevId: af66b98b717c523f2c1e187796f513e077f1c9d2

README.chromium

diff --git a/README.chromium b/README.chromium
index a69bf4e..6caf2b1 100644
--- a/README.chromium
+++ b/README.chromium
@@ -3,8 +3,9 @@
 URL: https://github.com/benjaminp/six
 Version: 1.14.0
 License: MIT
-License File: NOT_SHIPPED
+License File: LICENSE
 Security Critical: No
+Shipped: no
 Description:
 Six is a Python 2 and 3 compatibility library. It provides utility functions for smoothing over the differences between the Python versions with the goal of writing Python code that is compatible on both Python versions.
 Local Modifications: