fix(deps): update dependency mongodb to v6.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mongodb	6.8.0 -> 6.8.1

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Release Notes

mongodb/node-mongodb-native (mongodb)

### [`v6.8.1`](https://redirect.github.com/mongodb/node-mongodb-native/compare/v6.8.0...0c6dbada1512ed1b2f217ceb07d446ce5cbd27b7) [Compare Source](https://redirect.github.com/mongodb/node-mongodb-native/compare/v6.8.0...v6.8.1)

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