对Logo进行微调

README.md

@@ -1,6 +1,6 @@
 <p align="center">
 <a href="https://liteflow.yomahub.com/">
-    <img src="static/img/logo-main.png" alt="logo">
+    <img src="static/img/logo-main.svg" alt="logo">
 </a>
 </p>
 

README.zh-CN.md

@@ -1,6 +1,6 @@
 <p align="center">
 <a href="https://liteflow.yomahub.com/">
-    <img src="static/img/logo-main.png" alt="logo">
+    <img src="static/img/logo-main.svg" alt="logo">
 </a>
 </p>