chore(owners): add rhedgar to gen-ai approvers and reviewers (opendatahub-io#5955)

Signed-off-by: Matthew F Leader <mleader@redhat.com>

Author: mfleader

OWNERS_ALIASES

@@ -132,6 +132,7 @@ aliases:
     - NickGagan
     - mfleader
     - ederign
+    - rhdedgar
   gen-ai-reviewers:
     - agagancarczyk
     - ikeola13
@@ -144,3 +145,4 @@ aliases:
     - NickGagan
     - mfleader
     - ederign
+    - rhdedgar