[Firebird-website] Jira 3-13 is EOL

[marius a. p. <ma...@gm...>]

https://confluence.atlassian.com/jirakb/blog/2011/08/jira-3-13-end-of-life

Maybe is time to migrate to github issues
https://spring.io/blog/2019/01/15/spring-framework-s-migration-from-jira-to-github-issues