Fix/veryfy window po st fail / 修复 windowPoST 验证失败的问题

[LinZexiao]

关联的Issues (Related Issues)

ref: filecoin-project/lotus#10733

改动 (Proposed Changes)

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 存在兼容性问题（接口, 配置，数据，灰度），如果存在需要进行文档说明 / This PR has compatibility issues (API, Configuration, Data, GrayRelease), if so, need to be documented.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[simlecode]

lgtm

[codecov-commenter]

Codecov Report

Merging #5927 (3b419ed) into release/v1.11 (785f1ef) will increase coverage by 0%.
The diff coverage is n/a.

Additional details and impacted files

@@              Coverage Diff              @@
##           release/v1.11   #5927   +/-   ##
=============================================
  Coverage             24%     24%           
=============================================
  Files                657     657           
  Lines              79551   79551           
=============================================
+ Hits               19536   19540    +4     
+ Misses             57429   57424    -5     
- Partials            2586    2587    +1