Bump maven-shade-plugin from 2.4.3 to 3.2.4

Bumps [maven-shade-plugin](https://github.com/apache/maven-shade-plugin) from 2.4.3 to 3.2.4.
- [Release notes](https://github.com/apache/maven-shade-plugin/releases)
- [Commits](apache/maven-shade-plugin@maven-shade-plugin-2.4.3...maven-shade-plugin-3.2.4)

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

Author: dependabot[bot]

samples/mysql-schema/pom.xml

@@ -70,7 +70,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>2.4.3</version>
+                <version>3.2.4</version>
                 <executions>
                     <execution>
                         <phase>package</phase>

samples/webserver/pom.xml

@@ -65,7 +65,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>2.4.3</version>
+                <version>3.2.4</version>
                 <executions>
                     <execution>
                         <phase>package</phase>