dep: update packaged sqlite3 to v3.39.4

[flavorjones]

https://sqlite.org/releaselog/3_39_4.html

From the release notification sent by sqlite maintainers:

Version 3.39.4 is a minimal patch against the prior release that addresses issues found since the prior release. In particular, a potential vulnerability in the FTS3 extension has been fixed, so this should be considered a security update.

In order to exploit the vulnerability, an attacker must have full SQL access and must be able to construct a corrupt database with over 2GB of FTS3 content. The problem arises from a 32-bit signed integer overflow.