add oldstable

.github/workflows/ci.yml

@@ -21,14 +21,21 @@ concurrency:
 jobs:
   unit-tests:
     runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version: [
+          oldstable,
+          stable,
+          ]
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
 
       - name: Setup Golang Environment
         uses: actions/setup-go@v5
         with:
-          go-version: stable
+          go-version: ${{ matrix.go-version }}
 
       - name: Run Unit Tests
         run: go test ./... -race -shuffle=on -v