fix: enable auto_tag for Woodpecker

.woodpecker.yml

@@ -13,6 +13,7 @@ steps:
     image: woodpeckerci/plugin-docker-buildx
     group: build
     settings:
+      auto_tag: true
       repo: *repo
       registry: *registry
       platforms: *platforms
@@ -27,6 +28,7 @@ steps:
     group: build
     secrets: [docker_username, docker_password]
     settings:
+      auto_tag: true
       repo: *repo
       registry: *registry
       platforms: *platforms
@@ -35,7 +37,7 @@ steps:
       password:
         from_secret: docker_password
     when:
-      event: [push, tag]
+      event: push
       branch: master
 
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