.oniro-ci: run HawkBit publishing job on tag pipelines

This is consistent with the job which builds the bundles.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@huawei.com>

.oniro-ci/build-generic.yaml

@@ -394,6 +394,8 @@
   rules:
     # Publishing is done only for scheduled builds
     - if: '$CI_PIPELINE_SOURCE == "schedule"'
+    # Run the job when a tag is placed.
+    - if: '$CI_COMMIT_TAG'
     # For merge requests, the publishing is optional and can be triggered manually.
     - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
       when: manual