fix ci; specify flash-attn version

Author: YeAnbang

.github/workflows/run_chatgpt_examples.yml

@@ -43,9 +43,9 @@ jobs:
           pip install --no-cache-dir -v .
           pip install --no-cache-dir -r examples/requirements.txt
 
-      - name: Install flash-attention
-        run: |
-          pip install flash-attn==2.7.4.post1 --no-build-isolation
+      # - name: Install flash-attention
+      #   run: |
+      #     pip install flash-attn==2.7.4.post1 --no-build-isolation
 
       # - name: Install Transformers
       #   run: |