Add KNN operator to the list of operators (#381)

Co-authored-by: Emmanuel Keller <[email protected]>
Co-authored-by: ekwuno <[email protected]>

versioned_docs/version-nightly/surrealql/operators.mdx

@@ -162,6 +162,10 @@ sidebar_position: 5
     <td><a href="#matches"><code>@@</code> or <code>@[ref]@</code></a></td>
     <td>Checks whether the terms are found in a full-text indexed field</td>
   </tr>
+  <tr>
+    <td><a href="#KNN"><code> &lt;|4|&gt; </code> or <code>&lt;|3,HAMMING| &gt;</code></a></td>
+    <td>Performs a K-Nearest Neighbors (KNN) search to find a specified number of records closest to a given data point, optionally using a defined distance metric. Supports customizing the number of results and choice of distance calculation method.</td>
+  </tr>
 </tbody>
 </table>
 
@@ -777,4 +781,4 @@ ORDER BY score DESC;
 ]
 ```
 
-<br /><br />
+<br /><br />