onnxruntime

5cc7fb4a - [JSEP] Upgrade to ONNX Opset 21 (#22595)

[JSEP] Upgrade to ONNX Opset 21 (#22595) ### JSEP Ops that need updating - [x] Cast - [x] ReduceMax - [x] ReduceMin - [x] Squeeze - [x] Unsqueeze - [x] Transpose - [x] AveragePool - [x] Flatten - [x] Pad - [x] If