build: upgrade javadoc plugin to 3.11.1

Author: javier-godoy

pom.xml

@@ -291,7 +291,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>3.10.0</version>
+                        <version>3.11.1</version>
                         <executions>
                             <execution>
                                 <id>attach-javadocs</id>
@@ -306,7 +306,7 @@
                             <doclint>none</doclint>
                             <failOnWarnings>true</failOnWarnings>
                             <links>
-                                <link>https://javadoc.io/doc/com.vaadin/vaadin-platform-javadoc/${vaadin.version}</link>								
+                                <link>https://javadoc.io/doc/com.vaadin/vaadin-platform-javadoc/${vaadin.version}</link>
                             </links>
                         </configuration>
                     </plugin>