change wording

src/pages/index.tsx

@@ -145,8 +145,8 @@ export default function Home() {
 
   return (
     <main className={`flex flex-col items-center justify-center min-h-screen mx-auto p-24 ${inter.className}`}>
-      <h1 className="text-5xl font-bold text-center">Open Source Calendar</h1>
-      <p className="text-center mt-2 text-sm">A calendar for open source model releases.</p>
+      <h1 className="text-5xl font-bold text-center">Open Source Heatmap</h1>
+      <p className="text-center mt-2 text-sm">A heatmap for open source model releases.</p>
       <div className="mt-16">
         {isLoading ? (
           <p>Loading...</p>