Bump jakarta.tck:sigtest-maven-plugin from 2.1 to 2.2 (#567)

Bumps [jakarta.tck:sigtest-maven-plugin](https://github.com/eclipse-ee4j/jakartaee-tck-tools) from 2.1 to 2.2.
- [Release notes](https://github.com/eclipse-ee4j/jakartaee-tck-tools/releases)
- [Commits](eclipse-ee4j/jakartaee-tck-tools@sigtest-2.1...sigtest-2.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -225,7 +225,7 @@
                 <plugin>
                     <groupId>jakarta.tck</groupId>
                     <artifactId>sigtest-maven-plugin</artifactId>
-                    <version>2.1</version>
+                    <version>2.2</version>
                 </plugin>
                 <!-- Plugin versions since ee4j parent no longer declares them-->
                 <plugin>