fix .drone.yml

.drone.yml

@@ -16,7 +16,7 @@ pipeline:
    tag:
       - latest
       - "1.3.0"
-    when:
+   when:
       event: [pull_request, push, tag]
       branch: master
 
@@ -30,6 +30,6 @@ pipeline:
    tag:
       - latest
       - "1.4.0"
-    when:
+   when:
       event: [pull_request, push, tag]
       branch: master