Test syntax

.drone.yml

@@ -56,8 +56,6 @@ steps:
   settings:
     bucket: raw
     endpoint: https://storage.opytex.org
-    access_key: ${MINIO_ACCESS_KEY}
-    secret_key: ${MINIO_SECRET_KEY}
     source: ./**/*
     target: /
     exclude: ".gitignore"
@@ -69,7 +67,7 @@ steps:
     exclude: "*.tex"
     path_style: true
   environment:
-    MINIO_ACCESS_KEY:
+    access_key:
       from_secret: minio_access_key
-    MINIO_SECRET_KEY:
+    secret_key:
       from_secret: minio_secret_key