[Fabric Bot] Reflect CODEOWNERS for Digital Twins (Azure#26749)

The focus of these changes is to update the "Service Attention" contacts
for Digital Twins to reflect the most recent updates to CODEOWNERS.

Author: jsquire

.github/fabricbot.json

@@ -1871,13 +1871,10 @@
             "Digital Twins"
           ],
           "mentionees": [
-            "drwill-ms",
-            "timtay-microsoft",
-            "abhipsaMisra",
-            "vinagesh",
-            "azabbasi",
-            "barustum",
-            "jamdavi"
+            "johngallardo",
+            "efriesner",
+            "abhinav-gha",
+            "Aashish93-stack"
           ]
         },
         {