feat(theme): add flight sim on linux to title

src/theme.config.tsx

@@ -1,7 +1,12 @@
 export default {
-  logo: <span>Flight Sim on Linux</span>,
   project: {
     link: 'https://github.com/smyalygames/flightsim-on-linux',
   },
   docsRepositoryBase: 'https://github.com/smyalygames/flightsim-on-linux/blob/main',
+  logo: <span>Flight Sim on Linux</span>,
+  useNextSeoProps() {
+    return {
+      titleTemplate: '%s - Flight Sim on Linux'
+    }
+  }
 }