security/vuxml: Revise SQLite3 entry

• mention this bug is only for >= 3.49.1 according to https://github.com/google/security-research/security/advisories/GHSA-v2c8-vqqp-hv3g

• advance the discovery date to Mid July per the same

• strip double -9.6 from linux_base-rl9 name to get the entry to actually trigger for the package, and set it to ">= 0" because we don't want unrelated updates to linux_base-rl9-9.6 make this entry disappear. It's left for emulation@ to clean up.

Security: CVE-2025-7709
Security: c5889223-b4e1-11f0-ae9b-b42e991fc52e