use Spin setup action to install canary in CI

Author: dicej

.github/workflows/build.yml

@@ -14,14 +14,10 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Spin
-        # TODO: Switch to Spin 4.0 when it's available        
-        run: |
-          curl -OL https://github.com/spinframework/spin/releases/download/canary/spin-canary-linux-amd64.tar.gz
-          tar xf spin-canary-linux-amd64.tar.gz
-          pwd >> $GITHUB_PATH          
-        # uses: fermyon/actions/spin/setup@v1
-        # with:
-        #   version: "v4.0.0"
+        uses: fermyon/actions/spin/setup@v1
+        with:
+          # TODO: Switch to Spin 4.0 when it's available        
+           version: "canary"
 
       - name: Build examples and run tests
         run: |