Bump junit-pioneer from 1.8.0 to 1.9.1

Bumps [junit-pioneer](https://github.com/junit-pioneer/junit-pioneer) from 1.8.0 to 1.9.1.
- [Release notes](https://github.com/junit-pioneer/junit-pioneer/releases)
- [Commits](junit-pioneer/junit-pioneer@v1.8.0...v1.9.1)

---
updated-dependencies:
- dependency-name: org.junit-pioneer:junit-pioneer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle.kts

@@ -36,7 +36,7 @@ subprojects {
         set("log4jVersion", "2.19.0")           // https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core
         set("guavaVersion", "31.1-jre")         // https://mvnrepository.com/artifact/com.google.guava/guava
         set("junitVersion", "5.9.1")            // https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api
-        set("junitPioneerVersion", "1.8.0")     // https://mvnrepository.com/artifact/org.junit-pioneer/junit-pioneer
+        set("junitPioneerVersion", "1.9.1")     // https://mvnrepository.com/artifact/org.junit-pioneer/junit-pioneer
         set("mockitoVersion", "4.9.0")          // https://mvnrepository.com/artifact/org.mockito/mockito-junit-jupiter
         set("hamcrestVersion", "2.2")           // https://mvnrepository.com/artifact/org.hamcrest/hamcrest-core
     }