🐛 处理topic_info字段缺失的问题

[AzideCupric]

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01% 🎉

Comparison is base (e7dcfde) 82.38% compared to head (d115817) 82.39%.
Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #354      +/-   ##
==========================================
+ Coverage   82.38%   82.39%   +0.01%     
==========================================
  Files          64       64              
  Lines        3252     3254       +2     
==========================================
+ Hits         2679     2681       +2     
  Misses        573      573              

Flag	Coverage Δ
smoke-test	82.39% <100.00%> (+0.01%)	⬆️

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Files Changed	Coverage Δ
nonebot_bison/platform/bilibili.py	92.01% <100.00%> (+0.05%)	⬆️

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