Populate maintainers from upstream MAINTAINERS

Replace the placeholder github-handle with the four current maintainers listed in the upstream MAINTAINERS.md file.

project-maintainers (4):

  alexzhc, JoelColledge, WanzenBug, rck

Source of truth: https://github.com/piraeusdatastore/piraeus/blob/master/MAINTAINERS.md

Signed-off-by: Riaan Kleinhans <riaankleinhans@gmail.com>

Author: riaankleinhans

maintainers.yaml

@@ -1,7 +1,6 @@
 # Maintainer roster for Piraeus Datastore
 # Documentation: https://github.com/cncf/automation/tree/main/utilities/dot-project
 
-# TODO: Add maintainer GitHub handles
 
 #  Maintainers: Please connect your GitHub handle to your LFID on openprofile.dev to enable automatic access to CNCF resources. The system will use your primary email address for setup.
 maintainers:
@@ -10,5 +9,7 @@ maintainers:
     teams:
       - name: "project-maintainers"
         members:
-          # TODO: Add maintainer handles
-          - github-handle
+          - alexzhc
+          - JoelColledge
+          - WanzenBug
+          - rck