improve header svg and do no shrink it

components/header.tsx

@@ -8,10 +8,10 @@ export default function Header({ label = 'Pfadi Bussle' }: { label?: string }) {
   return (
     <>
       <div className="flex flex-row items-center p-3 my-3 text-white bg-gray-600 rounded-sm">
-        <h1 className="mr-3 flex-grow text-3xl">
+        <h1 className="mr-3 flex-grow text-2xl">
           <Link href="/">{label}</Link>
         </h1>
-        <Logo />
+        <Logo className="w-40 flex-shrink-0 text-white" />
       </div>
       {username && (
         <div className="info-message">