fix: Activate central-publishing-maven-plugin in build (#1706)

The plugin was only in pluginManagement, not in the active build/plugins
section. This caused maven-deploy-plugin to run instead, resulting in:
"repository element was not specified in the POM inside distributionManagement"

Adding the plugin to build/plugins ensures it's active during deployment.

Signed-off-by: GitHub Action <action@github.com>
Co-authored-by: GitHub Action <action@github.com>

Author: ricardozanini

pom.xml

@@ -220,6 +220,17 @@
 
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.sonatype.central</groupId>
+        <artifactId>central-publishing-maven-plugin</artifactId>
+        <version>${version.org.sonatype.central}</version>
+        <extensions>true</extensions>
+        <configuration>
+          <publishingServerId>central</publishingServerId>
+          <autoPublish>true</autoPublish>
+          <waitUntil>uploaded</waitUntil>
+        </configuration>
+      </plugin>
       <!-- Set properties containing the scm revision -->
       <plugin>
         <groupId>org.codehaus.mojo</groupId>