Fix CI workflow: update Rust action, remove submodules option

Author: Developer

.github/workflows/openvx-conformance.yml

@@ -28,8 +28,6 @@ jobs:
     steps:
     - name: Checkout rustVX
       uses: actions/checkout@v4
-      with:
-        submodules: recursive
 
     - name: Install system dependencies
       run: |
@@ -44,7 +42,7 @@ jobs:
           python3-pip
     
     - name: Setup Rust toolchain
-      uses: dtolnay/rust-action@stable
+      uses: actions-rust-lang/setup-rust-toolchain@v1
       with:
         toolchain: stable
         components: rustfmt, clippy