Upgrade MongoDB.Driver to 3.9.0

[maliming]

Upgrade MongoDB.Driver from 3.8.1 to 3.9.0.

https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.9.0

[Copilot]

Pull request overview

This PR updates the centrally managed MongoDB .NET driver dependency used by ABP MongoDB integrations from 3.8.1 to 3.9.0.

Changes:

• Bumps MongoDB.Driver in central package management.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.46%. Comparing base (78a8d3a) to head (02b6094).
⚠️ Report is 17 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #25484      +/-   ##
==========================================
- Coverage   49.47%   49.46%   -0.02%     
==========================================
  Files        3671     3671              
  Lines      123907   123907              
  Branches     9472     9472              
==========================================
- Hits        61304    61287      -17     
- Misses      60770    60784      +14     
- Partials     1833     1836       +3     

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