Apply suggestion from @aignas

Author: aignas

CHANGELOG.md

@@ -81,6 +81,7 @@ END_UNRELEASED_TEMPLATE
   installed wheel targets, except when built from sdist
   ([#3024](https://github.com/bazel-contrib/rules_python/issues/3024)).
 * (system_python) Fix AttributeError exception on Debian 10 Buster
+  python installations which may not set `sys._base_executable`
   ([#3774](https://github.com/bazel-contrib/rules_python/issues/3774)).