ci-dockerfiles-deployment: Switch to build-amd64-private

To give access to S3 buckets used by some images.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I22ae74cc602434108bd0c9c5598ec0ceeeb3c217
diff --git a/ci-dockerfiles-deployment.yaml b/ci-dockerfiles-deployment.yaml
index 23ce2d6..d3eca1f 100644
--- a/ci-dockerfiles-deployment.yaml
+++ b/ci-dockerfiles-deployment.yaml
@@ -17,7 +17,7 @@
               - "ci-docker*"
             block-level: 'NODE'
     disabled: false
-    node: build-amd64
+    node: build-amd64-private
     concurrent: false
     display-name: 'CI Dockerfiles build/publish deployment'
     parameters: