Merge pull request 'ci: use CA-baked plugin-docker-buildx image for artifactapi push' (#5) from benvin/buildx-ca-plugin-image into main

Reviewed-on: #5

.woodpecker/build.yaml

@@ -3,7 +3,7 @@ when:
 
 steps:
   - name: docker-build
-    image: woodpeckerci/plugin-docker-buildx
+    image: artifactapi.k8s.syd1.au.unkin.net/docker-internal/plugin-docker-buildx:latest
     settings:
       repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/bootapi
       dry_run: true

.woodpecker/docker.yaml

@@ -4,7 +4,7 @@ when:
 
 steps:
   - name: docker-bootapi
-    image: woodpeckerci/plugin-docker-buildx
+    image: artifactapi.k8s.syd1.au.unkin.net/docker-internal/plugin-docker-buildx:latest
     settings:
       registry: artifactapi.k8s.syd1.au.unkin.net
       repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/bootapi