updated doc for ConnectionConfigCallback (#1674) (#1676)

(cherry picked from commit 0b81acc)

Signed-off-by: psingh3 <pushpendra.singh@walmart.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: psingh3 <pushpendra.singh@walmart.com>

Author: 3 people

java-client/src/main/java/org/opensearch/client/transport/httpclient5/ApacheHttpClient5TransportBuilder.java

@@ -409,7 +409,8 @@ public interface RequestConfigCallback {
     /**
      * Callback used the default {@link ConnectionConfig} being set to the {@link CloseableHttpClient}.
      * The connectTimeout setting has been moved from {@link RequestConfig} to {@link ConnectionConfig}.
-     * @see HttpClientBuilder#setDefaultRequestConfig
+     * Should not be used if you are using {@link HttpClientBuilder#setConnectionManager} within {@link HttpClientConfigCallback}, as anything passed here will be overridden.
+     * @see PoolingAsyncClientConnectionManager#setDefaultConnectionConfig
      */
     public interface ConnectionConfigCallback {
         /**