fix: drop-down symbols

src/Analysis.tsx

@@ -52,7 +52,7 @@ export default function Analysis() {
   return (
     <div className="stack column dropdown">
       <button onClick={() => setShowControlPanel(!showControlPanel)}>
-        Parameters {showControlPanel ? "⮝" : "⮟"}
+        Parameters {showControlPanel ? "🞁" : "🞃"}
       </button>
       <div id="control-panel" className={showControlPanel ? "opened" : "closed"}>