chore: repleace version marker in features.bzl

(cherry picked from commit 3ddb601)

Author: rickeylev

python/features.bzl

@@ -26,7 +26,7 @@ def _features_typedef():
     A map of public API targets available in rules_python for feature detection
     purposes.
 
-    :::{versionadded} VERSION_NEXT_FEATURE
+    :::{versionadded} 1.9.0
     :::
     ::::