Add Roddie and Daniele as ToolHive Maintainers (#1965)

Added new maintainers to the MAINTAINERS.md file.

Author: rdimitrov

MAINTAINERS.md

@@ -69,6 +69,8 @@ The current list of ToolHive maintainers:
 <!-- This section will be updated as maintainers are added -->
 
 * [@stacklok/stackers](https://github.com/orgs/stacklok/teams/stackers)
+* [@dmartinol (RedHat)](https://github.com/dmartinol)
+* [@RoddieKieley (RedHat)](https://github.com/RoddieKieley)
 
 ## Becoming a Maintainer