fix: replace "UI builds automatically" with "UI builds itself" in selection screens

https://claude.ai/code/session_01M6YRViV1SVqE9DoZwXMbbd

Author: claude

docs/technical/dx.md

@@ -45,7 +45,7 @@ What abap2UI5 adds: a way to run in the browser without ADT, with a UI5 frontend
 
 ### Classic Input Handling with Selection Screens
 
-Input handling was never a challenge in classic ABAP — define a Report with `PARAMETERS` and `SELECT-OPTIONS`, and the UI builds automatically. The term didn't exist back then, but this gave you a "full-stack" app in just a few lines:
+Input handling was never a challenge in classic ABAP — define a Report with `PARAMETERS` and `SELECT-OPTIONS`, and the UI builds itself. The term didn't exist back then, but this gave you a "full-stack" app in just a few lines:
 
 ```abap
 REPORT zre_app_input.