ci-user-guide: Move to docker-amd64-tf-a-jammy node

For security reason, we don't run jobs on the master
node

Change-Id: I31f3cdcff2cb8ce972e219fbfe03521a394faf9c
Signed-off-by: Arthur She <arthur.she@linaro.org>
diff --git a/ci-users-guide.yaml b/ci-users-guide.yaml
index c751e3f..39fb52f 100644
--- a/ci-users-guide.yaml
+++ b/ci-users-guide.yaml
@@ -11,7 +11,7 @@
             days-to-keep: 90
             num-to-keep: 200
     disabled: false
-    node: master
+    node: docker-amd64-tf-a-jammy
     concurrent: false
     display-name: 'CI Users Guide publish deployment'
     scm: