#15971: [skip ci] Update dead link (#15975)

### Ticket

#15971

### Problem description

@dsklavos reported a dead link to resnet

Fixed

### What's changed

cc: @mywoodstock @LPanosTT 

### Checklist
- [x] Post commit CI passes
https://github.com/tenstorrent/tt-metal/actions/runs/12301771527
- [ ] Blackhole Post commit (if applicable)
- [ ] Model regression CI testing passes (if applicable)
- [ ] Device performance regression CI testing passes (if applicable)
- [ ] **(For models and ops writers)** Full [new
models](https://github.com/tenstorrent/tt-metal/actions/workflows/full-new-models-suite.yaml)
tests passes
- [ ] New/Existing tests provide coverage for changes

docs/source/ttnn/ttnn/get_started.rst

@@ -26,7 +26,7 @@ Get started with the Falcon 7B demo. Navigate to the `Falcon 7B demo folder
 for details.
 
 You can also check our demos for
-`ResNet <https://github.com/tenstorrent/tt-metal/tree/main/models/demos/resnet>`_,
+`ResNet <https://github.com/tenstorrent/tt-metal/tree/main/models/demos/ttnn_resnet>`_,
 `BERT <https://github.com/tenstorrent/tt-metal/tree/main/models/demos/metal_BERT_large_11>`_,
 `Mistral 7B <https://github.com/tenstorrent/tt-metal/tree/main/models/demos/wormhole/mistral7b>`_,
 and