ci: reduce tested go versions

.github/workflows/test.yml

@@ -22,20 +22,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go-version: ["1.13", "1.21", "1.22", "1.23"]
+        go-version: ["1.22", "1.23"]
     steps:
+      - uses: actions/checkout@v4
       - name: Install Go
         uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go-version }}
-      - name: Checkout code
-        uses: actions/checkout@v4
-      - uses: actions/cache@v4
-        with:
-          path: ~/go/pkg/mod
-          key: go-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            go-
       - name: Test
         run: |
           go test -race ./...