Update build-unsigned.yaml

.github/workflows/build-unsigned.yaml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.20
+          go-version: "1.20"
       - uses: actions/cache@v3
         with:
           path: |