ci: fix function returns test issue due to docs_changed.txt not found

.github/workflows/tdgpt-test.yml

@@ -122,6 +122,13 @@ jobs:
           cd ${{ env.WKC }}
           git submodule update --init --recursive
 
+      - name: Output the 'file_no_doc_changed' information to the file
+        run: |
+          mkdir -p ${{ env.WKDIR }}/tmp/${{ env.PR_NUMBER }}_${{ github.run_number }}
+          cd ${{ env.WKC }}
+          changed_files_non_doc=$(git --no-pager diff --name-only FETCH_HEAD `git merge-base FETCH_HEAD ${{ env.TARGET_BRANCH }}`|grep -v "^docs/en/"|grep -v "^docs/zh/"|grep -v ".md$" | tr '\n' ' ' || :)
+          echo $changed_files_non_doc > ${{ env.WKDIR }}/tmp/${{ env.PR_NUMBER }}_${{ github.run_number }}/docs_changed.txt
+      
       - name: Check assert testing
         run: |
           cd ${{ env.WKC }}/tests/parallel_test