title: Spring Doc Open API shows invalid field name on swagger ui
body: <p>There is an invalid model shown on swagger UI when there is only one lowercase letter at the beginning of the field name.</p>
  <p>My Kotlin model:</p>
  <pre><code>class TrendEvaluationModel(
      val xAxisValue: Int,
      val yAxisValue: Int,
      val customValue: Int?
  )
  </code></pre>
  <p>What is shown on swagger UI:</p>
  <pre><code>{
    &quot;customValue&quot;: 1,
    &quot;xaxisValue&quot;: 1,
    &quot;yaxisValue&quot;: 1
  }
  </code></pre>
  <p>I've tried:</p>
  <ol>
  <li><code>@Parameter</code> annotation with specified <code>name</code> attribute but it does not work.</li>
  <li><code>@Schema</code> annotation with specified <code>name</code> attribute but it does not work.</li>
  <li><code>@JsonProperty(&quot;xAxisValue&quot;)</code> and it worked but not as expected -  the model on swagger showed two fields then (<code>xaxisValue</code> and <code>xAxisValue</code>) but I need only one of them (<code>xAxisValue</code>).</li>
  </ol>
  <p>Appreciate your help.</p>
  <p><strong>NOTE</strong>: <em>There is no issue if there are two or more lowercase letters at the beginning of the field name</em></p>