fix: run second stage as well

.gitlab-ci.yml

@@ -28,6 +28,7 @@ generate the search index:
   rules:
     - if: $CI_COMMIT_BRANCH == "master"
     - if: $CI_COMMIT_BRANCH == "develop"
+    - if: $CI_COMMIT_BRANCH == "16-deploy-to-staticpages-vm"
   script:
     - bash .ci/build_indices.sh
     - mv build processed_build