[TT-13742] Update swagger to 5.7.1 (#6803)

### **User description**
<details open>
<summary><a href="https://tyktech.atlassian.net/browse/TT-13742"
title="TT-13742" target="_blank">TT-13742</a></summary>
  <br />
  <table>
    <tr>
      <th>Summary</th>
      <td>Update Tyk API documentation for 5.3.9/5.7.1 release</td>
    </tr>
    <tr>
      <th>Type</th>
      <td>
<img alt="Task"
src="https://tyktech.atlassian.net/rest/api/2/universal_avatar/view/type/issuetype/avatar/10318?size=medium"
/>
        Task
      </td>
    </tr>
    <tr>
      <th>Status</th>
      <td>In Dev</td>
    </tr>
    <tr>
      <th>Points</th>
      <td>N/A</td>
    </tr>
    <tr>
      <th>Labels</th>
      <td>-</td>
    </tr>
  </table>
</details>
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https://tyktech.atlassian.net/browse/TT-13742 updates swagger version


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### **PR Type**
enhancement


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### **Description**
- Updated the Swagger API documentation to reflect the new version
`5.7.1`.
- This change ensures the API documentation is aligned with the latest
release.



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### **Changes walkthrough** 📝
<table><thead><tr><th></th><th align="left">Relevant
files</th></tr></thead><tbody><tr><td><strong>Enhancement</strong></td><td><table>
<tr>
  <td>
    <details>
<summary><strong>swagger.yml</strong><dd><code>Update Swagger API
version to 5.7.1</code>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </dd></summary>
<hr>

swagger.yml

<li>Updated the <code>version</code> field in the Swagger API
documentation from <code>5.7.0</code> <br>to <code>5.7.1</code>.<br>


</details>


  </td>
<td><a
href="https://github.com/TykTechnologies/tyk/pull/6803/files#diff-8f3c4cb253eee09ae2401daa7279a8bbfbfd4168bb579c3ac0ee5c672d63bb2c">+1/-1</a>&nbsp;
&nbsp; &nbsp; </td>

</tr>
</table></td></tr></tr></tbody></table>

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> 💡 **PR-Agent usage**: Comment `/help "your question"` on any pull
request to receive relevant information

swagger.yml

@@ -30,7 +30,7 @@ info:
     name: Mozilla Public License Version 2.0
     url: https://github.com/TykTechnologies/tyk/blob/master/LICENSE.md
   title: Tyk Gateway API
-  version: 5.7.0
+  version: 5.7.1
 servers:
 - url: https://{tenant}
   variables: