Bump spring-cloud-dependencies from Hoxton.SR7 to Hoxton.SR8

Bumps [spring-cloud-dependencies](https://github.com/spring-cloud/spring-cloud-build) from Hoxton.SR7 to Hoxton.SR8.
- [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

@@ -111,7 +111,7 @@
             <dependency>
                 <groupId>org.springframework.cloud</groupId>
                 <artifactId>spring-cloud-dependencies</artifactId>
-                <version>Hoxton.SR7</version>
+                <version>Hoxton.SR8</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>