ci:优化 ChangeLog 消息格式

- 使用 sed命令将多行 commit message转换为单行，解决格式问题
- 确保在推送事件中生成正确的 ChangeLog 消息

.github/workflows/maven.yml

@@ -41,7 +41,7 @@ jobs:
     - name: Format ChangeLog
       id: get-changelog
       if: success() && github.event_name == 'push' && github.repository == 'MemoriesOfTime/EconomyAPI' && contains(github.ref_name, 'master')
-      run: echo "changelog=${{ github.event.commits[0].message }}" >> $GITHUB_OUTPUT
+      run: echo "changelog=$(echo '${{ github.event.commits[0].message }}' | sed ':a;N;$!ba;s/\n/\\n/g')" >> $GITHUB_OUTPUT
     - name: Get Time
       id: time
       uses: nanzm/[email protected]