chore: Bump org.pitest:pitest-maven from 1.15.3 to 1.15.8

Bumps [org.pitest:pitest-maven](https://github.com/hcoles/pitest) from 1.15.3 to 1.15.8.
- [Release notes](https://github.com/hcoles/pitest/releases)
- [Commits](hcoles/pitest@1.15.3...1.15.8)

---
updated-dependencies:
- dependency-name: org.pitest:pitest-maven
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -102,7 +102,7 @@
                 <plugin>
                     <groupId>org.pitest</groupId>
                     <artifactId>pitest-maven</artifactId>
-                    <version>1.15.3</version>
+                    <version>1.15.8</version>
                     <dependencies>
                         <dependency>
                             <groupId>org.pitest</groupId>