perf: update readme

README.md

@@ -1,6 +1,6 @@
 <p align="center">
 <a href="https://github.com/zggsong/STranslate" target="_blank">
-<img align="center" alt="STranslate" src="./translate.png" />
+<img align="center" alt="STranslate" src="./translate.svg" />
 </a>
 </p>
 <p align="center">

translate.svg

@@ -0,0 +1 @@
+<?xml version="1.0" ?><svg data-name="Layer 1" id="Layer_1" viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg"><defs><style>.cls-1{fill:#ba63c6;}</style></defs><title/><path class="cls-1" d="M31.79,28.11l-7-14a2,2,0,0,0-3.58,0L18,20.56,15.3,18.73A17.13,17.13,0,0,0,19.91,9H22a2,2,0,0,0,0-4H14V3a2,2,0,0,0-4,0V5H2A2,2,0,0,0,2,9H15.86a13.09,13.09,0,0,1-3.79,7.28,13.09,13.09,0,0,1-3.19-4.95,2,2,0,1,0-3.77,1.34A17.1,17.1,0,0,0,8.9,18.75L3.84,22.37a2,2,0,0,0,2.33,3.25l5.93-4.24,4.08,2.79-2,3.93a2,2,0,0,0,3.58,1.79l.45-.89H23a2,2,0,0,0,0-4H20.24L23,19.47l5.21,10.42a2,2,0,0,0,3.58-1.79Z"/></svg>