adding git submodule pull build step

.drone.yml

@@ -2,10 +2,17 @@ kind: pipeline
 name: default
 
 steps:
+- name: submodules
+  image: alpine/git
+  commands:
+  - git submodule update --recursive --remote
+
 - name: build
-  image: ariejan/drone-hugo
+  image: plugins/hugo
   settings:
     hugo_version: 0.80.0
+    pull: always
+    validate: true
 
 - name: deploy
   image: appleboy/drone-scp