Bump httpclient in /spring-cloud-stream-binder-rabbit

Bumps httpclient from 4.5.6 to 4.5.13.

Resolves spring-cloud#321
---
updated-dependencies:
- dependency-name: org.apache.httpcomponents:httpclient
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

spring-cloud-stream-binder-rabbit/pom.xml

@@ -83,7 +83,7 @@
 			<!-- Temporary override - see  https://github.com/spring-projects/spring-boot/issues/16043 -->
 			<groupId>org.apache.httpcomponents</groupId>
 			<artifactId>httpclient</artifactId>
-			<version>4.5.6</version>
+			<version>4.5.13</version>
 		</dependency>
 	</dependencies>
 </project>