chore(deps): update harbor.cryptic.systems/docker/plugins/docker docker tag to v20.18.8

.drone.yml

@@ -66,7 +66,7 @@ steps:
   image: git.cryptic.systems/volker.raschek/git:1.4.0
 
 - name: build
-  image: docker.io/plugins/docker:20.18.6
+  image: harbor.cryptic.systems/docker/plugins/docker:20.18.8
   settings:
     auto_tag: false
     dockerfile: Dockerfile
@@ -132,7 +132,7 @@ steps:
   image: git.cryptic.systems/volker.raschek/git:1.4.0
 
 - name: build
-  image: docker.io/plugins/docker:20.18.6
+  image: harbor.cryptic.systems/docker/plugins/docker:20.18.8
   settings:
     auto_tag: false
     dockerfile: Dockerfile
@@ -197,7 +197,7 @@ steps:
   image: git.cryptic.systems/volker.raschek/git:1.4.0
 
 - name: build-manifest
-  image: docker.io/plugins/manifest:1.4.0
+  image: harbor.cryptic.systems/docker/plugins/manifest:1.4.0
   settings:
     auto_tag: false
     ignore_missing: true
@@ -315,7 +315,7 @@ steps:
   image: git.cryptic.systems/volker.raschek/git:1.4.0
 
 - name: build
-  image: docker.io/plugins/docker:20.18.6
+  image: harbor.cryptic.systems/docker/plugins/docker:20.18.8
   settings:
     auto_tag: true
     auto_tag_suffix: amd64
@@ -377,7 +377,7 @@ steps:
   image: git.cryptic.systems/volker.raschek/git:1.4.0
 
 - name: build-manifest
-  image: docker.io/plugins/manifest:1.4.0
+  image: harbor.cryptic.systems/docker/plugins/manifest:1.4.0
   settings:
     auto_tag: true
     ignore_missing: true