External CI: change supported branches

Change-Id: I3c3db1243d067720fd141eeb204d9b0b3e7a9fd6

.azuredevops/rocm-ci.yml

@@ -20,7 +20,8 @@ trigger:
   batch: true
   branches:
     include:
-    - master
+    - amd-staging
+    - amd-master
   paths:
     exclude:
     - .github
@@ -31,7 +32,8 @@ pr:
   autoCancel: true
   branches:
     include:
-    - master
+    - amd-staging
+    - amd-master
   paths:
     exclude:
     - .github