Fix HTML documentation error (#2187)

Author: predic8

core/src/main/java/com/predic8/membrane/core/transport/http/client/HttpClientConfiguration.java

@@ -27,7 +27,6 @@
  * Allows defining proxy, connection, authentication, TLS, and retry behavior.
  * Can be used as a reusable bean and referenced via <spring:bean>.
  * Most of its sub-elements are optional.
- * <p>
  * <p>YAML:</p>
  * <pre><code>httpClientConfig:
  *   maxRetries: 5