Reorder CI unit tests. (#908)

.github/workflows/unit-test.yml

@@ -36,11 +36,6 @@ jobs:
         pip install flashinfer -i https://flashinfer.ai/whl/cu121/torch2.3/ --force-reinstall
         pip install --upgrade transformers
 
-    - name: Test Frontend Language with OpenAI Backend
-      run: |
-        cd test/lang
-        python3 test_openai_backend.py
-
     - name: Test Frontend Language with SRT Backend
       run: |
         cd test/lang
@@ -55,3 +50,8 @@ jobs:
       run: |
         cd test/srt
         python3 test_eval_accuracy.py
+
+    - name: Test Frontend Language with OpenAI Backend
+      run: |
+        cd test/lang
+        python3 test_openai_backend.py