docs: DiviSaver names ValueCleaner as the choke point (W2 note)

Docblock only; the kses window description is otherwise unchanged.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7

src/Integrations/Divi/Pages/DiviSaver.php

@@ -26,7 +26,7 @@ use WP_Post;
  * filters (kses_remove_filters()) are therefore switched off – only when they were active – and
  * restored in finally (kses_init_filters()) right after wp_update_post() returns, before flags,
  * cache and every other follow-up. Every value the Divi tools write was sanitized and every
- * $variable(…)$ re-serialized by the plugin before (AttrWriter, VariableRef, WpValueSanitizer).
+ * $variable(…)$ re-serialized by the plugin before (ValueCleaner, VariableRef, WpValueSanitizer).
  *
  * The window (review M-5): kses_remove_filters() removes ALL core kses filters – post content,
  * title, excerpt, content_filtered and comments (pre_comment_content) – while exactly two calls