Fix: optimize build push image step (#5215)

Signed-off-by: FogDong <dongtianxin.tx@alibaba-inc.com>

Signed-off-by: FogDong <dongtianxin.tx@alibaba-inc.com>

references/docgen/def-doc/workflowstep/build-push-image.eg.md

@@ -32,14 +32,21 @@ spec:
     - name: build-push
       type: build-push-image
       properties:
-        # use your kaniko executor image like below, if not set, it will use default image gcr.io/kaniko-project/executor:latest
-        # kanikoExecutor: oamdev/kaniko-executor:v1.9.1
-        git: https://github.com/FogDong/simple-web-demo
-        branch: main
+        # use your kaniko executor image like below, if not set, it will use default image oamdev/kaniko-executor:v1.9.1
+        # kanikoExecutor: gcr.io/kaniko-project/executor:latest
+        # you can use context with git and branch or directly specify the context, please refer to https://github.com/GoogleContainerTools/kaniko#kaniko-build-contexts
+        context:
+          git: github.com/FogDong/simple-web-demo
+          branch: main
         image: fogdong/simple-web-demo:v1
+        # specify your dockerfile, if not set, it will use default dockerfile ./Dockerfile
+        # dockerfile: ./Dockerfile
         credentials:
           image:
             name: image-secret
+        # buildArgs:
+        #   - key="value"
+        # platform: linux/arm
     - name: apply-comp
       type: apply-component
       properties:

references/docgen/def-doc/workflowstep/clean-jobs.eg.md

@@ -12,4 +12,5 @@ spec:
       type: clean-jobs
       properties:
         labelSelector:
-          "my-label": my-value
+          "my-label": my-value
+```