Update '.drone.yml'

.drone.yml

@@ -5,7 +5,7 @@ name: default
 
 steps:
 
-- name: docker
+  - name: docker
     image: plugins/docker
     settings:
       repo: bunix42/pre-commit
@@ -16,7 +16,7 @@ steps:
       tags:
         - latest
 
-- name: slack
+  - name: slack
     image: plugins/slack
     settings:
       webhook: