ORT 1.20 docs update (#22693)

### Description
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Updating links in the operator docs to reference releases 1.19 + 1.20.


### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->

docs/reference/compatibility.md

@@ -68,6 +68,8 @@ ONNX Runtime supports all opsets from the latest released version of the [ONNX](
 
 | ONNX Runtime version | [ONNX version](https://github.com/onnx/onnx/blob/master/docs/Versioning.md) | ONNX opset version | ONNX ML opset version | ONNX IR version |
 |------------------------------|--------------------|--------------------|----------------------|------------------|
+| 1.20 | **1.16.1** | 21 | 4 | 10 |
+| 1.19 | **1.16.1** | 21 | 4 | 10 |
 | 1.18 | **1.16** | 21 | 4 | 10 |
 | 1.17 | **1.15** | 20 | 4 | 9 |
 | 1.16 | **1.14.1** | 19 | 3 | 9 |

docs/reference/operators/ContribOperators.md

@@ -22,6 +22,8 @@ The contrib operator schemas are documented in the ONNX Runtime repository.
 | Release | Documentation |
 |---------|---------------|
 | Main | [https://github.com/microsoft/onnxruntime/blob/main/docs/ContribOperators.md](https://github.com/microsoft/onnxruntime/blob/main/docs/ContribOperators.md) |
+| 1.20 | [https://github.com/microsoft/onnxruntime/blob/rel-1.20.0/docs/ContribOperators.md](https://github.com/microsoft/onnxruntime/blob/rel-1.20.0/docs/ContribOperators.md)|
+| 1.19 | [https://github.com/microsoft/onnxruntime/blob/rel-1.19.0/docs/ContribOperators.md](https://github.com/microsoft/onnxruntime/blob/rel-1.19.0/docs/ContribOperators.md)|
 | 1.18 | [https://github.com/microsoft/onnxruntime/blob/rel-1.18.0/docs/ContribOperators.md](https://github.com/microsoft/onnxruntime/blob/rel-1.18.0/docs/ContribOperators.md)|
 | 1.17 | [https://github.com/microsoft/onnxruntime/blob/rel-1.17.0/docs/ContribOperators.md](https://github.com/microsoft/onnxruntime/blob/rel-1.17.0/docs/ContribOperators.md)|
 | 1.16 | [https://github.com/microsoft/onnxruntime/blob/rel-1.16.0/docs/ContribOperators.md](https://github.com/microsoft/onnxruntime/blob/rel-1.16.0/docs/ContribOperators.md)|

docs/reference/operators/OperatorKernels.md

@@ -10,6 +10,8 @@ The operator kernels supported by the CPU Execution Provider, CUDA Execution Pro
 | Release | Documentation |
 |---------|---------------|
 | Current main | [https://github.com/microsoft/onnxruntime/blob/main/docs/OperatorKernels.md](https://github.com/microsoft/onnxruntime/blob/main/docs/OperatorKernels.md) |
+| 1.20 | [https://github.com/microsoft/onnxruntime/blob/rel-1.20.0/docs/OperatorKernels.md](https://github.com/microsoft/onnxruntime/blob/rel-1.20.0/docs/OperatorKernels.md) |
+| 1.19 | [https://github.com/microsoft/onnxruntime/blob/rel-1.19.0/docs/OperatorKernels.md](https://github.com/microsoft/onnxruntime/blob/rel-1.19.0/docs/OperatorKernels.md) |
 | 1.18 | [https://github.com/microsoft/onnxruntime/blob/rel-1.18.0/docs/OperatorKernels.md](https://github.com/microsoft/onnxruntime/blob/rel-1.18.0/docs/OperatorKernels.md) |
 | 1.17 | [https://github.com/microsoft/onnxruntime/blob/rel-1.17.0/docs/OperatorKernels.md](https://github.com/microsoft/onnxruntime/blob/rel-1.17.0/docs/OperatorKernels.md) |
 | 1.16 | [https://github.com/microsoft/onnxruntime/blob/rel-1.16.0/docs/OperatorKernels.md](https://github.com/microsoft/onnxruntime/blob/rel-1.16.0/docs/OperatorKernels.md)|