Update rust.yml to use caching

.github/workflows/rust.yml

@@ -20,6 +20,12 @@ jobs:
     - uses: actions/checkout@v4
     - name: Install system dependencies
       run: sudo apt-get install -y libasound2-dev libudev-dev
+    - name: Cache build artifacts
+      uses: actions/[email protected]
+      with:
+        path: |
+          key: "Rust build cache"
+          **/target
     - name: Build
       run: cargo build --verbose
     - name: Run tests