Fix source repository links in maven plugin site

Closes gh-9671

Author: snicoll

spring-boot-tools/spring-boot-maven-plugin/pom.xml

@@ -112,9 +112,13 @@
 								</reports>
 							</reportSet>
 						</reportSets>
+						<configuration>
+							<webAccessUrl>https://github.com/spring-projects/spring-boot/</webAccessUrl>
+							<anonymousConnection>scm:git:git://github.com/spring-projects/spring-boot.git</anonymousConnection>
+							<developerConnection>scm:git:ssh://git@github.com/spring-projects/spring-boot.git</developerConnection>
+						</configuration>
 					</plugin>
 				</plugins>
-
 			</reporting>
 		</profile>
 	</profiles>