docs: use absolute URL for demo GIF in README

Fix demo GIF not displaying on npm by using GitHub raw URL

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: bitjaru

README.ko.md

@@ -13,7 +13,7 @@
 
 ## 🎬 데모
 
-![CodeSyncer Demo](./demo.gif)
+![CodeSyncer Demo](https://raw.githubusercontent.com/bitjaru/codesyncer/main/demo.gif)
 
 ---
 

README.md

@@ -13,7 +13,7 @@
 
 ## 🎬 Demo
 
-![CodeSyncer Demo](./demo.gif)
+![CodeSyncer Demo](https://raw.githubusercontent.com/bitjaru/codesyncer/main/demo.gif)
 
 ---
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "codesyncer",
-  "version": "2.7.3",
+  "version": "2.7.4",
   "description": "AI-powered multi-repository collaboration system - Works with Claude Code, Cursor, GitHub Copilot, and more",
   "keywords": [
     "ai-collaboration",