Use kaniko plugin in docs as example (#4072)

docs/docs/20-usage/20-workflow-syntax.md

@@ -104,7 +104,7 @@ When using the `local` backend, the `image` entry is used to specify the shell,
        - go test
 
    - name: publish
-+    image: woodpeckerci/plugin-docker-buildx
++    image: woodpeckerci/plugin-kaniko
      repo: foo/bar
 
  services:
@@ -484,7 +484,7 @@ Normally steps of a workflow are executed serially in the order in which they ar
        - go build
 
    - name: deploy
-     image: woodpeckerci/plugin-docker-buildx
+     image: woodpeckerci/plugin-kaniko
      settings:
        repo: foo/bar
 +    depends_on: [build, test] # deploy will be executed after build and test finished

docs/docs/20-usage/50-environment.md

@@ -172,7 +172,7 @@ Example commit substitution:
 ```diff
  steps:
    - name: docker
-     image: woodpeckerci/plugin-docker-buildx
+     image: woodpeckerci/plugin-kaniko
      settings:
 +      tags: ${CI_COMMIT_SHA}
 ```
@@ -182,7 +182,7 @@ Example tag substitution:
 ```diff
  steps:
    - name: docker
-     image: woodpeckerci/plugin-docker-buildx
+     image: woodpeckerci/plugin-kaniko
      settings:
 +      tags: ${CI_COMMIT_TAG}
 ```
@@ -210,7 +210,7 @@ Example variable substitution with substring:
 ```diff
  steps:
    - name: docker
-     image: woodpeckerci/plugin-docker-buildx
+     image: woodpeckerci/plugin-kaniko
      settings:
 +      tags: ${CI_COMMIT_SHA:0:8}
 ```
@@ -220,7 +220,7 @@ Example variable substitution strips `v` prefix from `v.1.0.0`:
 ```diff
  steps:
    - name: docker
-     image: woodpeckerci/plugin-docker-buildx
+     image: woodpeckerci/plugin-kaniko
      settings:
 +      tags: ${CI_COMMIT_TAG##v}
 ```

docs/docs/20-usage/51-plugins/51-overview.md

@@ -34,7 +34,7 @@ steps:
       - go test
 
   - name: publish
-    image: woodpeckerci/plugin-docker-buildx
+    image: woodpeckerci/plugin-kaniko
     settings:
       repo: foo/bar
       tags: latest

pipeline/frontend/yaml/linter/linter_test.go

@@ -39,7 +39,7 @@ steps:
       - go build
       - go test
   publish:
-    image: woodpeckerci/plugin-docker-buildx
+    image: woodpeckerci/plugin-kaniko
     settings:
       repo: foo/bar
       foo: bar
@@ -61,7 +61,7 @@ steps:
       - go build
       - go test
   - name: publish
-    image: woodpeckerci/plugin-docker-buildx
+    image: woodpeckerci/plugin-kaniko
     settings:
       repo: foo/bar
       foo: bar

pipeline/frontend/yaml/utils/image_test.go

@@ -255,8 +255,8 @@ func Test_matchImage(t *testing.T) {
 			want: false,
 		},
 		{
-			from: "woodpeckerci/plugin-docker-buildx",
-			to:   "docker.io/woodpeckerci/plugin-docker-buildx",
+			from: "woodpeckerci/plugin-kaniko",
+			to:   "docker.io/woodpeckerci/plugin-kaniko",
 			want: true,
 		},
 	}