Bump actions/setup-go from 5 to 6 (#201)

Author: dependabot[bot]

.github/workflows/unit-test.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Set up Go 1.x
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version: ^1.21