[auto] Update onnx to ceb259c - Tests for ReduceLogSum (#862)
https://github.com/onnx/onnx/commit/ceb259c903aa5dfe99ff4ab529ac0d773f5cddab
diff --git a/third_party/onnx b/third_party/onnx
index 1c600f8..ceb259c 160000
--- a/third_party/onnx
+++ b/third_party/onnx
@@ -1 +1 @@
-Subproject commit 1c600f802d2569bfa95cbfd36da4527daa377047
+Subproject commit ceb259c903aa5dfe99ff4ab529ac0d773f5cddab