Updated CI

Author: ankane

.github/workflows/build.yml

@@ -8,8 +8,8 @@ jobs:
       matrix:
         go: ["1.25", "1.24", "1.23"]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
           cache: false # depends on go.sum