Add jsturtevant as maintainer and Move marosset to emeritus (#1428)

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

Author: jsturtevant

.github/CODEOWNERS

@@ -1,2 +1,2 @@
 # Global Code Owners
-* @danbugs @ludfjig @dblnz @devigned @syntactically @marosset @jprendes @simongdavies
+* @danbugs @devigned @dblnz @jsturtevant @jprendes @syntactically @ludfjig @simongdavies @andreiltd

MAINTAINERS.md

@@ -5,11 +5,16 @@
 | Danilo Chiarlone   | [@danbugs](https://github.com/danbugs)             |
 | David Justice      | [@devigned](https://github.com/devigned)           |
 | Doru Blânzeanu     | [@dblnz](https://github.com/dblnz)                 |
+| James Sturtevant   | [@jsturtevant](https://github.com/jsturtevant)     |
 | Jorge Prendes      | [@jprendes](https://github.com/jprendes)           |
 | Lucy Menon         | [@syntactically](https://github.com/syntactically) |
 | Ludvig Liljenberg  | [@ludfjig](https://github.com/ludfjig)             |
-| Mark Rosetti       | [@marosset](https://github.com/marosset)           |
 | Simon Davies       | [@simongdavies](https://github.com/simongdavies)   |
 | Tomasz Andrzejak   | [@andreiltd](https://github.com/andreiltd)         |
 
 <!-- Note: Please maintain alphabetical order when adding new entries to the table. -->
+
+## Emeritus
+| Name               | GitHub ID                                          |
+|--------------------|----------------------------------------------------|
+| Mark Rosetti       | [@marosset](https://github.com/marosset)           |