Update required reviewers in .asf.yaml

Added new reviewers for the release environment.
diff --git a/.asf.yaml b/.asf.yaml
index 7f01074..0d12d57 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -23,10 +23,14 @@
   environments:
     release:
       required_reviewers:
-        - id: grails-committers
-          type: Team
         - id: jdaugherty
           type: User
+        - id: matrei
+          type: User
+        - id: jamesfredley
+          type: User
+        - id: sbglasius
+          type: User
       wait_timer: 0
   description: "Apache Grails - GitHub Actions"
   homepage: https://grails.apache.org/