fix: Update Dockerfile.reference (#665)

**Reason for Change**:
Update reference

Signed-off-by: Ishaan Sehgal <ishaanforthewin@gmail.com>

docs/custom-model-integration/Dockerfile.reference

@@ -16,7 +16,7 @@ RUN echo $VERSION > /workspace/tfs/version.txt
 # This is done before copying the code to utilize Docker's layer caching and
 # avoid reinstalling dependencies unless the requirements file changes.
 # Inference
-COPY presets/inference/${MODEL_TYPE}/requirements.txt /workspace/tfs/inference-requirements.txt
+COPY presets/dependencies/requirements.txt /workspace/tfs/inference-requirements.txt
 RUN pip install --no-cache-dir -r inference-requirements.txt
 
 COPY presets/inference/${MODEL_TYPE}/inference_api.py /workspace/tfs/inference_api.py