rename primary branch (#67)

Reviewed-on: https://gitea.com/gitea/changelog/pulls/67

.drone.yml

@@ -54,7 +54,7 @@ platform:
 
 trigger:
   branch:
-    - master
+    - main
   event:
     - push
     - tag
@@ -75,7 +75,7 @@ steps:
       - export PATH=$PATH:$GOPATH/bin
       - make release
 
-  - name: bucket-master
+  - name: bucket-main
     pull: always
     image: woodpeckerci/plugin-s3:latest
     settings:
@@ -84,7 +84,7 @@ steps:
       endpoint: https://ams3.digitaloceanspaces.com
       source: "dist/release/*"
       strip_prefix: dist/release/
-      target: /changelog-tool/master
+      target: /changelog-tool/main
     environment:
       AWS_ACCESS_KEY_ID:
         from_secret: aws_access_key_id