fixes typo

public/index.html

@@ -69,7 +69,7 @@ <h2>Let's Get in Touch</h2>
         <label for="name">Name:</label>
         <input type="text" id="name" name="name" placeholder="Name">
         <label for="age">Age:</label>
-        <input type="number" id="age" name="age" min="0" max="120" placeholder="Age">
+        <input type="number" id="ageInput" name="age" min="0" max="120" placeholder="Age">
         <label for="gender">Gender:</label>
         <select id="gender" name="gender">
           <option value="" disabled selected>Select your gender</option>