Update copy.bara.sky

Test: copybara copy.bara.sky
Change-Id: If5cd55a158ade84984bf6bcf4c3f014d4f38fa2e
diff --git a/copy.bara.sky b/copy.bara.sky
index 0f9df66..05a00dd 100644
--- a/copy.bara.sky
+++ b/copy.bara.sky
@@ -19,7 +19,7 @@
         ],
     ),
     destination = git.gerrit_destination(
-        url = "rpc://android-review.googlesource.com/platform/external/desugar",
+        url = "sso://android/platform/external/desugar",
         fetch = "upstream-master",
         push_to_refs_for = "upstream-master",
     ),