added Florent as maintaner

Signed-off-by: Andres Taylor <andres@planetscale.com>

MAINTAINERS.md

@@ -10,6 +10,7 @@ The following is the full list, alphabetically ordered.
 * David Weitzman ([dweitzman](https://github.com/dweitzman)) dweitzman@pinterest.com
 * Deepthi Sigireddi ([deepthi](https://github.com/deepthi)) deepthi@planetscale.com
 * Derek Perkins ([derekperkins](https://github.com/derekperkins)) derek@nozzle.io
+* Florent Poinsard ([frouioui](https://github.com/frouioui)) frouioui@planetscale.com
 * Harshit Gangal ([harshit-gangal](https://github.com/harshit-gangal)) harshit.gangal@gmail.com
 * Jon Tirsen ([tirsen](https://github.com/tirsen)) jontirsen@squareup.com
 * Manan Gupta ([GuptaManan100](https://github.com/GuptaManan100)) manan@planetscale.com
@@ -37,6 +38,9 @@ sougou, rafael, tirsen, dweitzman, systay, rohit-nayak-ps, deepthi
 ### Parser
 sougou, dweitzman, systay, harshit-gangal, vmg, GuptaManan100
 
+### Planner
+sougou, systay, harshit-gangal, GuptaManan100, frouioui
+
 ### Performance
 vmg