Update changelog for BMP completeness

Author: yawnoc

CHANGELOG.md

@@ -3,14 +3,17 @@
 
 ## [Unreleased]
 
+- Fulfilled full coverage of Basic Multilingual Plane
+  by adding toggle settings for *optional* characters
+  (which may not have system font support)
 - Updated stroke input data to [Conway Stroke Data v2.0.0]
-  - Adds (optional) characters U+9FD1 鿑 to U+9FFF 鿿
-  - Adds (optional) characters U+4DB6 䶶 to U+4DBF 䶿
-  - Adds (optional) character 𠀤
+  - Adds *optional* characters U+9FD1 鿑 to U+9FFF 鿿
+  - Adds *optional* characters U+4DB6 䶶 to U+4DBF 䶿
+  - Adds *optional* character 𠀤
   - Adds character 𠮟
   - Adds characters 𠂇𠦝𡯂𤴓𦉪𨸏
   - Adds characters 𠓗𠓾𣁾𤾩
-  - Adds (optional) character 𫟷
+  - Adds *optional* character 𫟷
 
 
 ## [v1.5.0] (71) Cursed be Android 16 for ever and ever (2025-09-21)