Update maintainers to match community

Update maintainers to match community

Signed-off-by: Brandon Lum <[email protected]>

Author: lumjjb

MAINTAINERS.md

@@ -4,5 +4,8 @@ This file lists all current maintainers of the `spec` repository.
 
 - Dan Luhring (@luhring), Chainguard
 - Adolfo García Veytia (@puerco), Chainguard
+- Brandon Lum (@lumjjb), Google
+- Alex Goodman (@wagoodman), Anchore
+- Rose Judge (@rnjudge), VMWare
 
 New maintainers can be added via the process outlined in the OpenVEX community's [governance](https://github.com/openvex/community/blob/main/GOVERNANCE.md) document.