[Doc] add optimized and animated swag

README.md

@@ -1,8 +1,9 @@
 <div align="center">
 
 
-<img src="https://github.com/ai4co/rl4co/assets/48984123/01a547b2-9722-4540-b0e1-9c12af094b15" style="width:40%">
-
+<div align="center">
+    <img src="https://raw.githubusercontent.com/ai4co/assets/main/svg/rl4co_animated_full.svg" alt="AI4CO Logo" style="width: 40%; height: auto;">
+</div>
 
 </br></br>
 
@@ -199,8 +200,8 @@ We invite you to join our AI4CO community, an open research group in Artificial
 
 
 
-<p align="center">
-  <img width="30%" src="https://github.com/ai4co/rl4co/assets/48984123/2f1298ef-15e1-4a66-9741-78ee75938789">
-</p>
+<div align="center">
+    <img src="https://raw.githubusercontent.com/ai4co/assets/main/svg/ai4co_animated_full.svg" alt="AI4CO Logo" style="width: 30%; height: auto;">
+</div>