Bump org.apache.maven.plugins:maven-javadoc-plugin in /json-smart-action

Bumps [org.apache.maven.plugins:maven-javadoc-plugin](https://github.com/apache/maven-javadoc-plugin) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/apache/maven-javadoc-plugin/releases)
- [Commits](apache/maven-javadoc-plugin@maven-javadoc-plugin-3.7.0...maven-javadoc-plugin-3.8.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-javadoc-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

json-smart-action/pom.xml

@@ -99,7 +99,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-						<version>3.7.0</version>
+						<version>3.8.0</version>
 						<configuration>
                           <source>8</source>
                 		</configuration>
@@ -189,7 +189,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-				<version>3.7.0</version>
+				<version>3.8.0</version>
                 <!-- ONLY NEEDED With jdk 1.7+ -->
                 <configuration>
                     <source>8</source>