chore: improve CI workflow

Author: ldez

.github/workflows/build-test.yml

@@ -7,10 +7,10 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v1
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
         with:
-          go-version: 1.23.x
-      - uses: actions/checkout@v2
+          go-version: oldstable
       - name: Build
         run: go build ./...
       - name: Test