[api-platform/core] fix config (#1242)

Author: dunglas

api-platform/core/3.2/config/packages/api_platform.yaml

@@ -3,7 +3,7 @@ api_platform:
     version: 1.0.0
     formats:
         jsonld: ['application/ld+json']
-    doc_formats:
+    docs_formats:
         jsonld: ['application/ld+json']
         jsonopenapi: ['application/vnd.openapi+json']
         html: ['text/html']