add rust-cache action

.github/workflows/aicirt.yml

@@ -19,6 +19,9 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - run: rustup target add wasm32-wasi
+    - uses: Swatinem/rust-cache@v2
+      with:
+        cache-on-failure: true
     - name: Build aici_abi
       run: cargo build --verbose --release
       working-directory: aici_abi