EOL Health Check shows incorrect EOL date

Issue Summary

The EOL health check warning in Jira shows that the End of Life for Version 8.20.x is on 19th of October, but this has been extended to 31st December 2023. The check is correct for EOL that is exactly 24 months after the build date.

This is reproducible on Data Center: (yes) / (no)

Steps to Reproduce

1. Install a Jira 8.20.x instance

The health check appears to be hard coded to show a warning 24 months from the build date.

Expected Results

The health check is consistent with the EOL webpage, 31st of December.

Actual Results

The health check shows that the EOL date is 24 months after the build date.

Workaround

It is safe to ignore this warning.