MAINTAINERS: fix jmarrero username and last name

Author: jmarrero

MAINTAINERS.md

@@ -9,4 +9,4 @@ The current Maintainers Group for the bootc Project consists of:
 | John Eckersberg   | [jeckersb](https://github.com/orgs/bootc-dev/people/jeckersb)        | Red Hat         | Approver         |
 | Xiaofeng Wang     | [henrywang](https://github.com/orgs/bootc-dev/people/henrywang)      | Red Hat         | Approver         |
 | Gursewak Mangat   | [gurusewak](https://github.com/orgs/bootc-dev/people/gursewak1997)   | Red Hat         | Approver         |
-| Joseph Corchado   | [jeckersb](https://github.com/orgs/bootc-dev/people/jmarrero)        | Red Hat         | Approver         |
+| Joseph Marrero    | [jmarrero](https://github.com/orgs/bootc-dev/people/jmarrero)        | Red Hat         | Approver         |