[BP-1.17][hotfix][docs] Update the versions of mongodb supported by mongodb-connector

[Jiabao-Sun]

What is the purpose of the change

Update the versions of mongodb supported by mongodb-connector

Brief change log

Currently, we are using mongodb-driver version 4.7.2.
https://www.mongodb.com/docs/drivers/java/sync/current/compatibility/

For mongo-driver version 4.7.2, theoretically, it supports mongodb server versions below 3.6.
However, it has not undergone rigorous testing.
Additionally, mongo-driver version 4.8 and above will no longer support mongodb versions below 3.6.
Therefore, we declare the minimum supported version of mongodb server as 3.6.

Verifying this change

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
• The serializers: (no)
• The runtime per-record code paths (performance sensitive): (no)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
• The S3 file system connector: (no)

Documentation

• Does this pull request introduce a new feature? (no)
• If yes, how is the feature documented? (docs)

[flinkbot]

CI report:

• 181a6cc Azure: SUCCESS

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[leonardBang]

+1