Re-add setup deno (oops)

.forgejo/workflows/ci.yaml

@@ -14,6 +14,10 @@ jobs:
         run: apt install nodejs -y
       - name: Checkout repo
         uses: actions/checkout@v4
+      - name: Setup Deno
+        uses: https://github.com/denoland/setup-deno@v2
+        with:
+          deno-version: v2.x
       - name: Build using Cargo
         run: cargo build --verbose
       - name: Run unit tests