Bump org.apache.maven.plugins:maven-gpg-plugin in /json-smart (#273)

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.2.7 to 3.2.8.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-3.2.7...maven-gpg-plugin-3.2.8)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-gpg-plugin
  dependency-version: 3.2.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

json-smart/pom.xml

@@ -100,7 +100,7 @@ limitations under the License.
 						<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-gpg-plugin -->
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>3.2.7</version>
+						<version>3.2.8</version>
 						<executions>
 							<execution>
 								<id>sign-artifacts</id>