fix favicon

theme.config.jsx

@@ -33,7 +33,7 @@ export default {
       <meta property="og:title" content="The Electron-Positron Lattice Space" />
       <meta property="og:description" content="This book is designed for readers with a basic understanding of physics. It offers an alternative approach to contemporary physics, focusing on the electron-positron lattice model. This model helps explain complex physical phenomena, derive fundamental laws, and perform calculations that may seem challenging in traditional presentations. If you're looking for a more accessible way to explore these topics and understand the 'whys' behind them, this book might be a valuable resource for you." />
       <meta property="og:image" content="https://loosetooth.github.io/epola-space-nextra/meta-image.png" />
-      <link rel="icon" type="image/png" href="/favicon.png"></link>
+      <link rel="icon" type="image/png" href="https://loosetooth.github.io/epola-space-nextra/favicon.png"></link>
     </>
   )
   // ... other theme options