Bump uk.org.webcompere:system-stubs-core from 2.1.1 to 2.1.2

Bumps [uk.org.webcompere:system-stubs-core](https://github.com/webcompere/system-stubs) from 2.1.1 to 2.1.2.
- [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-2.1.1...system-stubs-parent-2.1.2)

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

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

pom.xml

@@ -140,7 +140,7 @@
         <sonar.java.coveragePlugin>jacoco</sonar.java.coveragePlugin>
         <sonar.language>java</sonar.language>
         <sonar.organization>fraunhofer-iosb</sonar.organization>
-        <systemstubs.version>2.1.1</systemstubs.version>
+        <systemstubs.version>2.1.2</systemstubs.version>
         <wiremock.version>2.35.1</wiremock.version>
         <woodstox.version>6.5.1</woodstox.version>
     </properties>