chore: update Go version to 1.25 in GitHub Actions workflow

Author: mxab

.github/workflows/go.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: "^1.24"
+        go-version: "^1.25"
     - name: "Check format"
       run: "test -z $(gofmt -l .)"
     - name: Build