fix: remove echo $() wrapping to preserve newlines in deploy-data.yml

Co-authored-by: TechQuery <19969570+TechQuery@users.noreply.github.com>

Author: Copilot

.github/workflows/deploy-data.yml

@@ -21,11 +21,9 @@ jobs:
           cd data/
 
           echo -e "\n## 数据接口 / Data Interface\n" >> index.md
-          echo $(
-            ls -1 *.yml 2>/dev/null | \
+          ls -1 *.yml 2>/dev/null | \
             sed 's/\.yml$//' | nl | \
-            sed 's/^[[:space:]]*\([0-9]*\)[[:space:]]*\(.*\)$/\1. [\2](https:\/\/goodaction-hub.github.io\/GoodAction-data\/\2.json)/'
-          ) >> index.md
+            sed 's/^[[:space:]]*\([0-9]*\)[[:space:]]*\(.*\)$/\1. [\2](https:\/\/goodaction-hub.github.io\/GoodAction-data\/\2.json)/' >> index.md
           cd -
 
       - name: Deploy to GitHub pages