add matrix strategy to llmobs sdk ci job (#5451)

Author: rochdev

.github/workflows/llmobs.yml

@@ -15,23 +15,22 @@ concurrency:
 
 jobs:
   sdk:
+    strategy:
+      matrix:
+        version: [18, 20, 22, latest]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - uses: ./.github/actions/testagent/start
-      - uses: ./.github/actions/node/oldest-maintenance-lts
+      - uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4.2.0
+        with:
+          node-version: ${{ matrix.version }}
       - uses: ./.github/actions/install
       - run: yarn test:llmobs:sdk:ci
-      - uses: ./.github/actions/node/newest-maintenance-lts
-      - run: yarn test:llmobs:sdk:ci
-      - uses: ./.github/actions/node/active-lts
-      - run: yarn test:llmobs:sdk:ci
-      - uses: ./.github/actions/node/latest
-      - run: yarn test:llmobs:sdk:ci
       - if: always()
         uses: ./.github/actions/testagent/logs
         with:
-          suffix: llmobs-${{ github.job }}
+          suffix: llmobs-${{ github.job }}-${{ matrix.version }}
       - uses: codecov/codecov-action@13ce06bfc6bbe3ecf90edbbf1bc32fe5978ca1d3 # v5.3.1
 
   openai: