golang: ci: adjust cache

Author: jwatson0

.github/workflows/golang.yaml

@@ -16,6 +16,8 @@ jobs:
       uses: actions/setup-go@v5
       with:
         go-version: '1.25'
+        cache-dependency-path: |
+          runtime/golang/helloworld/go.sum
 
     - name: Install libuuid1 uuid-dev
       run: |
@@ -30,7 +32,8 @@ jobs:
     - name: Build
       run: |
         cd runtime/golang/helloworld
-        go build -v
+        go build
+        ./helloworld
 
     - name: Test
       run: |