ci: don't use dependencies and needs together

Using dependencies and needs together doesn't work, the needs will be ignored.

In addition, needs doesn't load the "needed job" artifacts by default, it has to be specified.

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2310>

.gitlab-ci.yml

@@ -268,9 +268,8 @@ build_documentation:
   stage: build
   image: python:3.11
   needs:
-    - build_openapi_schema
+    - job: build_openapi_schema
-  dependencies:
+      artifacts: true
-    - build_openapi_schema
   variables:
     BUILD_PATH: "../public"
     GIT_STRATEGY: clone
@@ -345,8 +344,9 @@ build_api:
 deploy_documentation:
   stage: publish
   image: alpine
-  dependencies:
+  needs:
-    - build_documentation
+    - job: build_documentation
+      artifacts: true
   before_script:
     - apk add openssh-client rsync
     - mkdir -p ~/.ssh