Adjust skip version data stream test (#62598)

after #62527 was backported.

Author: martijnvg

x-pack/plugin/src/test/resources/rest-api-spec/test/data_stream/10_basic.yml

@@ -358,8 +358,8 @@ setup:
 ---
 "Create index into a namespace that is governed by a data stream template":
   - skip:
-      version: " - 7.99.99"
-      reason: "adjust until #62527 is fully backported"
+      version: " - 7.9.1"
+      reason: "data streams only supported in 7.9+"
       features: allowed_warnings
 
   - do: