Try to fix docs publication

Signed-off-by: Marco Marinello <me@marcomarinello.it>

.gitlab-ci.yml

@@ -2,7 +2,7 @@ image: node:latest
 
 stages:
   - build
-  - build_documentation
+  - docs
 
 build:
   stage: build
@@ -12,8 +12,8 @@ build:
     - yarn test
     - yarn build
     
-build-documentation:
-  stage: build_documentation
+pages:
+  stage: docs
   script:
     - npm install --force --global yarn
     - yarn install