ci: use deploy stage for publish-* jobs

Signed-off-by: Chase Qi <chase.qi@linaro.org>

.gitlab-ci.yml

@@ -134,6 +134,7 @@ bundle-seco-intel-b68:
 
 publish-raspberrypi4-64:
   extends: .publish-rauc-bundle-to-hawkbit
+  stage: deploy
   dependencies: [bundle-raspberrypi4-64]
   needs: [bundle-raspberrypi4-64]
   variables:
@@ -144,6 +145,7 @@ publish-raspberrypi4-64:
 
 publish-seco-intel-b68:
   extends: .publish-rauc-bundle-to-hawkbit
+  stage: deploy
   dependencies: [bundle-seco-intel-b68]
   needs: [bundle-seco-intel-b68]
   variables: