Bump uk.org.webcompere:system-stubs-jupiter from 2.1.5 to 2.1.6

Bumps [uk.org.webcompere:system-stubs-jupiter](https://github.com/webcompere/system-stubs) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/webcompere/system-stubs/releases)
- [Changelog](https://github.com/webcompere/system-stubs/blob/main/History.md)
- [Commits](webcompere/system-stubs@system-stubs-parent-2.1.5...system-stubs-parent-2.1.6)

---
updated-dependencies:
- dependency-name: uk.org.webcompere:system-stubs-jupiter
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -63,7 +63,7 @@
     <maven.compiler.target>21</maven.compiler.target>
     <spring.cloud-version>2023.0.0</spring.cloud-version>
     <spring.security.version>6.1.4</spring.security.version>
-    <system-stubs-jupiter.version>2.1.5</system-stubs-jupiter.version>
+    <system-stubs-jupiter.version>2.1.6</system-stubs-jupiter.version>
     <thymeleaf-extras-springsecurity6.version>3.1.2.RELEASE</thymeleaf-extras-springsecurity6.version>
     <thymeleaf.layout.version>3.3.0</thymeleaf.layout.version>
   </properties>