temporarily restrict YML test

Author: danhermann

rest-api-spec/src/main/resources/rest-api-spec/test/indices.data_stream/10_basic.yml

@@ -1,8 +1,8 @@
 ---
 "Create data stream":
   - skip:
-      version: " - 7.6.99"
-      reason: available only in 7.7+
+      version: " - 7.99.99"
+      reason: "enable in 7.8+ after back-porting https://github.com/elastic/elasticsearch/pull/54467"
 
   - do:
       indices.create_data_stream: