docs: Add auto-suggest doc improvements to Changelog

Author: claremacrae

docs/What is New/Changelog.md

@@ -15,6 +15,7 @@ _In recent [Tasks releases](https://github.com/obsidian-tasks-group/obsidian-tas
 - X.Y.Z:
   - Add support for [[Links]] in custom filters, sorting and grouping.
   - The Tasks API can now edit existing task lines with [[Tasks Api#`editTaskLineModal(taskLine string) Promise<string>;`|editTaskLineModal()]].
+  - Documentation: New section: [[Auto-Suggest#Managing Auto-Suggest Conflicts With Other Plugins|Managing Auto-Suggest conflicts with other plugins]].
 - 7.20.0:
   - Add [[Presets]] feature to save commonly used task query instructions.
   - Document [[Missing tags, aliases and cssclasses in some Obsidian 1.9.x versions]] - for Insider users of Obsidian 1.9.x.