docs: update stale v1.1.2 version refs in doc/ to v1.1.4

Author: vietnguyentuan2019

doc/README.md

@@ -1,6 +1,6 @@
 # HyperRender Documentation
 
-Welcome to the documentation for **HyperRender v1.1.2** — the high-performance HTML/Markdown renderer for Flutter.
+Welcome to the documentation for **HyperRender v1.1.4** — the high-performance HTML/Markdown renderer for Flutter.
 
 ## Documentation Index
 
@@ -77,4 +77,4 @@ Design decisions that shaped the engine, useful for contributors:
 
 ---
 
-*Current stable: v1.1.2 — Last updated: March 2026*
+*Current stable: v1.1.4 — Last updated: March 2026*

doc/ROADMAP.md

@@ -1,7 +1,7 @@
 # HyperRender — Product Roadmap
 
 **Last Updated**: 2026-03-25
-**Current Stable**: v1.1.2
+**Current Stable**: v1.1.4
 **Repository**: [github.com/brewkits/hyper_render](https://github.com/brewkits/hyper_render)
 
 This document tracks the long-term direction of the HyperRender ecosystem.