update config to use key

.drone.yml

@@ -17,6 +17,9 @@ steps:
   - name: gitea_release
     image: plugins/gitea-release
     settings:
-      api_key: "{{secrets.publisher}}"
+      api_key: 
+        from_secret: gitea_api_key
       base_url: https://brn.systems:3000
       files: build/*
+    when: 
+      event: tag