Merge pull request #9276 from das-peter/patch-1

#9174 config migration fails with python error: jinja2.exceptions.UndefinedError: 'chart' is undefined

tools/migration/cfg/migrator_1_9_0/harbor.yml.jinja

@@ -117,9 +117,11 @@ notification:
   # Maximum retry count for webhook job
   webhook_job_max_retry: 10
 
+{% if chart is defined %}
 chart:
   # Change the value of absolute_url to enabled can enable absolute url in chart
   absolute_url: {{ chart.absolute_url if chart.absolute_url == 'enabled' else 'disabled' }}
+{% endif %}
 
 # Log configurations
 log:
@@ -265,4 +267,4 @@ proxy:
     - core
     - jobservice
     - clair
-{% endif %}
+{% endif %}