Bump jakarta.tck:sigtest-maven-plugin from 2.3 to 2.4

Bumps [jakarta.tck:sigtest-maven-plugin](https://github.com/eclipse-ee4j/jakartaee-tck-tools) from 2.3 to 2.4.
- [Release notes](https://github.com/eclipse-ee4j/jakartaee-tck-tools/releases)
- [Commits](eclipse-ee4j/jakartaee-tck-tools@sigtest-2.3...sigtest-2.4)

---
updated-dependencies:
- dependency-name: jakarta.tck:sigtest-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

tck/tck-runtime/pom.xml

@@ -35,7 +35,7 @@
     <properties>
         <shrinkwrap-resolver.version>3.3.2</shrinkwrap-resolver.version>
         <servlet.api.version>6.2.0-SNAPSHOT</servlet.api.version>
-        <sigtest.version>2.3</sigtest.version>
+        <sigtest.version>2.4</sigtest.version>
     </properties>
 
     <dependencies>