fix(tools): correct mongdb typo to pymongo in package_dependencies (#5891)

* fix(tools): correct mongdb typo to pymongo in package_dependencies

The `package_dependencies` field in `MongoDBVectorSearchTool` referenced
the non-existent package `mongdb` instead of the actual PyPI package
`pymongo`, which is the driver imported and used throughout the file.

* chore: update tool specifications

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