set rules for pages and deployment jobs to be the same (forks only)

.gitlab-ci.yml

@@ -123,7 +123,8 @@ pages:
   image: alpine:3.11.3
   stage: deploy
   rules:
-    - if: '$CI_MERGE_REQUEST_ID && $CI_PROJECT_NAMESPACE != "R3" && $CI_PROJECT_NAMESPACE != "R3-core"'
+    - if: '$CI_PIPELINE_SOURCE != "merge_request_event" && $CI_COMMIT_REF_NAME == "develop" && $CI_PROJECT_PATH == "R3/howto-cards"'
+    - if: '$CI_PIPELINE_SOURCE != "merge_request_event" && $CI_COMMIT_REF_NAME == "master" && $CI_PROJECT_PATH == "R3/howto-cards"'
   script:
     - mv processed_build public
   artifacts: