fixed mongo connect error

[quanbisen]

修复因升级pymongo4.x导致的mongo连接报错

'Collection' object is not callable. If you meant to call the 'insert_one' method on a 'Collection' object it is failing because no such method exists.

参见pymongo4.x官方文档

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.08%. Comparing base (8996542) to head (a6fa12e).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
sql/engines/mongo.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2760   +/-   ##
=======================================
  Coverage   78.08%   78.08%           
=======================================
  Files         122      122           
  Lines       17311    17311           
=======================================
  Hits        13518    13518           
  Misses       3793     3793           

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[LeoQuote]

谢谢贡献, 但本 pr 和 #2747 重复, 能否帮忙增加覆盖率? 覆盖率达标方便合并