ci: set CGO_ENABLED=0 during yanic build

Author: ksarink

.github/workflows/build-release.yaml

@@ -35,6 +35,8 @@ jobs:
       - name: Build yanic
         run: go build -ldflags "-X github.com/FreifunkBremen/yanic/cmd.VERSION=${{ inputs.yanic-version }}" -v -o yanic
         working-directory: ./yanic/
+        env:
+          CGO_ENABLED: 0
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3