Fix drone.yaml syntax

.drone.yaml

@@ -1,24 +1,24 @@
 ---
-    kind: pipeline
-    type: docker
-    name: default
+kind: pipeline
+type: docker
+name: default
 
-    trigger:
+trigger:
     event:
         - tag
 
-    platform:
+platform:
     os: linux
     arch: arm64
 
-    volumes:
+volumes:
     - name: cache
     temp: {}
 
-    environment:
+environment:
     DEBIAN_FRONTEND: noninteractive
 
-    steps:
+steps:
     - name: build
     image: golang:1.15
     pull: always
@@ -47,4 +47,3 @@
         - sha1
         - sha256
         - sha512
-