add og image for playground page

Author: jderochervlk

public/static/og/try.png

@@ -14,7 +14,11 @@ let default = props => {
   let playground = React.createElement(lazyPlayground, {versions: props.versions})
 
   <>
-    <Meta title="ReScript Playground" description="Try ReScript in the browser" />
+    <Meta
+      title="ReScript Playground"
+      description="Try ReScript in the browser"
+      ogImage="/static/og/try.png"
+    />
     <Next.Head>
       <style> {React.string(`body { background-color: #010427; }`)} </style>
     </Next.Head>