fix: og tag url

Author: nuskey8

index.html

@@ -10,14 +10,14 @@
   <meta property="og:title" content="Stacky Playground" />
   <meta property="og:description" content="The Stacky Language Playground" />
   <meta property="og:type" content="website" />
-  <meta property="og:image" content="https://https:/stacky-language.github.io/playground/summary.png" />
-  <meta property="og:url" content="https://https:/stacky-language.github.io/playground/" />
+  <meta property="og:image" content="https://stacky-language.github.io/playground/summary.png" />
+  <meta property="og:url" content="https://stacky-language.github.io/playground/" />
   <meta property="og:site_name" content="Stacky Playground" />
   <meta name="twitter:site_name" content="Stacky Playground" />
-  <meta name="twitter:card" content="summary_large_image" />
+  <meta name="twitter:card" content="summary" />
   <meta name="twitter:title" content="Stacky Playground" />
   <meta name="twitter:description" content="The Stacky Language Playground" />
-  <meta name="twitter:image" content="https://https:/stacky-language.github.io/playground/summary.png" />
+  <meta name="twitter:image" content="https://stacky-language.github.io/playground/summary.png" />
   <title>Stacky Playground</title>
 </head>