onnx: bump to 1.16.3

1.16.11 doesn't build due to wrong hash for eigen 3.4
-- SHA1 hash of
    eigen-3.4.zip
  does not match expected value
    expected: 'ee201b07085203ea7bd8eb97cbcb31b07cfa3efb'
      actual: '90414f534834cb5041a4c5ddece24978033d87c7'
-- Hash mismatch, removing...

Change-Id: I29c5b0f9e6926195ec30f5eb47624606e3b26589

contrib/src/onnx/rules.mak

 # ONNX
-ONNX_VERSION := v1.16.1
+ONNX_VERSION := v1.16.3
 ONNX_URL := https://github.com/microsoft/onnxruntime.git
 
 $(TARBALLS)/onnxruntime-$(ONNX_VERSION).tar.xz: