Point the compatibility link at the renamed docs page

The docs restructure renames fundamentals/loading-models to
fundamentals/downloading-models; the cards already carry the new path.

MODEL_CARD.md

@@ -130,7 +130,7 @@ them.
 
 To use them in React Native ExecuTorch, pass the model constant shipped in the
 library's model registry to the corresponding task pipeline. See the
-[documentation](https://docs.swmansion.com/react-native-executorch/docs/fundamentals/loading-models).
+[documentation](https://docs.swmansion.com/react-native-executorch/docs/fundamentals/downloading-models).
 
 To load these files in your own ExecuTorch runtime, read the
 [compatibility note](https://github.com/pytorch/executorch/blob/main/runtime/COMPATIBILITY.md)