Update dependency org.apache.maven.plugins:maven-site-plugin to v4.0.0-M15

Author: xdev-renovate

template-placeholder/pom.xml

@@ -90,7 +90,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-site-plugin</artifactId>
-					<version>4.0.0-M14</version>
+					<version>4.0.0-M15</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>