build(deps): bump native-maven-plugin from 0.9.20 to 0.9.21

Bumps [native-maven-plugin](https://github.com/graalvm/native-build-tools) from 0.9.20 to 0.9.21.
- [Release notes](https://github.com/graalvm/native-build-tools/releases)
- [Commits](graalvm/native-build-tools@0.9.20...0.9.21)

---
updated-dependencies:
- dependency-name: org.graalvm.buildtools:native-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -336,7 +336,7 @@
                     <plugin>
                         <groupId>org.graalvm.buildtools</groupId>
                         <artifactId>native-maven-plugin</artifactId>
-                        <version>0.9.20</version>
+                        <version>0.9.21</version>
                         <extensions>true</extensions>
                         <executions>
                             <execution>