Add find-links URL to iree pip install.

.github/workflows/test_models.yml

@@ -47,7 +47,7 @@ jobs:
           source turbine_venv/bin/activate
           python3.11 -m pip install --upgrade pip
           pip install --no-compile -r ${{ github.workspace }}/iree-turbine/pytorch-cpu-requirements.txt
-          pip install --no-compile --pre --no-cache-dir -r ${{ github.workspace }}/iree-turbine/iree-requirements.txt
+          pip install --no-compile --pre --no-cache-dir -r ${{ github.workspace }}/iree-turbine/iree-requirements.txt -f https://iree.dev/pip-release-links.html
           pip install --no-compile --pre --upgrade -e models -r models/requirements.txt 
       
       - name: Show current free memory