Clarification of when I "left" Zend

In an [entry for October 2018](https://github.com/JetBrains/php-timeline/blob/adbadb2e8b1e306b8e9746227b06be1ceae3aa2d/php-timeline.json#L215), you note that Zeev, Enrico, and I left Zend.

I left on 2019-06-30... but was hired back in October 2019 by Perforce (who acquired RogueWave, and thus Zend, in January of 2019). I continue to lead Laminas, while also performing a role in Product Management at the company, in the Zend division.