Update the xla commit to experiment potential fix for concatenate on large number of zero-broadcasts

Author: felixwqp

.github/workflows/test-gb-25.yml

@@ -47,7 +47,7 @@ jobs:
         julia_version:
           - '1.11'
         xla_commit:
-          - ''
+          - '38285eb34756919913c5e575b12403f4a1c5e0e0'
           # - 'b25f3cbed2bc88c8ffef85f6a5319e2cf7b0454c'
         gb25_commit:
           - 'main'