Bump spring-cloud-dependencies from Hoxton.SR3 to Hoxton.SR4

Bumps [spring-cloud-dependencies](https://github.com/spring-cloud/spring-cloud-build) from Hoxton.SR3 to Hoxton.SR4.
- [Release notes](https://github.com/spring-cloud/spring-cloud-build/releases)
- [Commits](https://github.com/spring-cloud/spring-cloud-build/commits)

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

pom.xml

@@ -47,7 +47,7 @@ Integrates with Spring Data, Spring Data REST and Apache Solr</description>
     <properties>
         <ginkgo4j-version>1.0.12</ginkgo4j-version>
         <springboot-version>2.2.6.RELEASE</springboot-version>
-        <spring-cloud.version>Hoxton.SR3</spring-cloud.version>
+        <spring-cloud.version>Hoxton.SR4</spring-cloud.version>
         <commonsio-version>2.6</commonsio-version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>