Ensure we fetch deps during spec-build stage

.gitlab-ci.yml

@@ -40,6 +40,7 @@ spec-build:
     paths:
     - spec.json
   script:
+  - mix deps.get
   - mix pleroma.openapi_spec spec.json
 
 benchmark:
@@ -393,4 +394,4 @@ docker-adhoc:
   tags:
     - dind
   only:
-    - /^build-docker/.*$/@pleroma/pleroma
+    - /^build-docker/.*$/@pleroma/pleroma