title: Ant design input validate to accept only alphabets and special characters but not numbers
body: <p>I am new to ant design. I want to validate a field to take only alphabets and special characters but not numbers. This is the approach I have used so far. I am using ant design 4.</p>
  
  <pre><code> &lt;Form.Item
                        label="First Name"
                        name="first_name"
                        rules={[
                          { required: true, message: REQUIRED_ERROR_MESSAGE },
                         {
                          pattern: new RegExp("/^[A-Z@~`!@#$%^&amp;*()_=+\\\\';:\"\\/?&gt;.&lt;,-]*$/i"),
                          message: "field does not accept numbers"
                         }
                        ]}
                      &gt;
                        &lt;Input  /&gt;
    &lt;/Form.Item&gt;
  </code></pre>
  
  <p>The above approach fails even if a user enters only letters. any help would be appreciated.</p>