chore(ci): go build: update actions/setup-go

Author: grokify

.github/workflows/ci.yaml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - name: Install Go
       if: success()
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version: ${{ matrix.go-version }}
     - name: Checkout code