[grumpydictator/firefly-iii] Firefly III insufficiently expires sessions

Firefly III prior to 6.0.0 insufficiently expires sessions upon close.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-1788
• https://github.com/firefly-iii/firefly-iii/commit/68f398f97cbe1870fc098d8460bf903b9c3fab30
• https://huntr.dev/bounties/79323c9e-e0e5-48ef-bd19-d0b09587ccb2
• https://github.com/advisories/GHSA-h7vv-46p5-prmh