use lastest manifest plugin

.drone.jsonnet

@@ -43,7 +43,7 @@ local docker(name, image, os, arch) = {
 # a docker manifest to a docker remote registry.
 local manifest(name) = {
     name: name,
-    image: "plugins/manifest:1",
+    image: "plugins/manifest",
     settings: {
         auto_tag: true,
         ignore_missing: true,

.drone.yml

@@ -257,7 +257,7 @@ platform:
 
 steps:
 - name: server
-  image: plugins/manifest:1
+  image: plugins/manifest
   settings:
     auto_tag: true
     ignore_missing: true
@@ -272,7 +272,7 @@ steps:
     - tag
 
 - name: agent
-  image: plugins/manifest:1
+  image: plugins/manifest
   settings:
     auto_tag: true
     ignore_missing: true
@@ -287,7 +287,7 @@ steps:
     - tag
 
 - name: controller
-  image: plugins/manifest:1
+  image: plugins/manifest
   settings:
     auto_tag: true
     ignore_missing: true