Rendering tests: use git lfs in github actions so the tests will succeed

.github/workflows/rust.yml

@@ -19,6 +19,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
+      with:
+        lfs: true
+    - name: Checkout LFS objects
+      run: git lfs checkout
     - uses: actions-rs/clippy-check@v1
       with:
         token: ${{ secrets.GITHUB_TOKEN }}