upgrade MongoDB versions in kb 0.9.3

[wallyxjh]

Request to upgrade MongoDB in KB 0.9.3 due to recent CVE vulnerabilities
https://jira.mongodb.org/browse/SERVER-115508

[shanshanying]

Hi @wallyxjh

we won't do any updates to those RELEASED versions. we may update these version in next release but it is not guaranted.

[shanshanying]

@xuriwuyun @gnolong pls evaluate the priority/workload and check if we can support it in next release.