docs[patch]: fix typo langchain version for mongodb integration (#14006)
- **Description:** update minimal supported langchain version for
[mongodb atlast integration
webpage](https://python.langchain.com/docs/integrations/vectorstores/mongodb_atlas)
- **Issue:** none
- **Dependencies:** none
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Just fixing a typo.
In [mongodb atlas vectorstore integration
page](https://python.langchain.com/docs/integrations/vectorstores/mongodb_atlas),
`langchain` support for `$vectorSearch MQL stage` should be `0.0.305`
rather than `0.0.35`