chore(deps): update dependency org.apache.maven.plugins:maven-source-plugin to v3.4.0

Author: renovate[bot]

prometheus-metrics-parent/pom.xml

@@ -118,7 +118,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-source-plugin</artifactId>
-            <version>3.3.1</version>
+            <version>3.4.0</version>
             <executions>
               <execution>
                 <id>attach-sources</id>