Update buildbucket file location in android_sdk README

Change-Id: I216cef1977664f2ae5e33e6ddf720321961bd806
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4033008
Commit-Queue: John Delaney <johnidel@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1072903}
NOKEYCHECK=True
GitOrigin-RevId: 630cf56211e451faac3095458ab2b26e045d9047

README.chromium

diff --git a/README.chromium b/README.chromium
index a8ae4c9..1804f73 100644
--- a/README.chromium
+++ b/README.chromium
@@ -34,7 +34,7 @@
 * Adding new sdk packages:
   * Prepare the CIPD yaml files for packages in the cipd/ directory.
   * Add them to android-sdk-packager buildbucket configuation file:
-    infra/config/subprojects/chromium/master-only/ci.star
+    infra/config/subprojects/chromium/ci/chromium.packager.star
   * Submit the changes into gerrit (See crrev.com/c/2241994 as a reference)
   * Follow the update instructions to get a build from the CI builder.
 * Updating this file: