chore: link to FlowingCode javadoc site instead of javadoc.io

Author: javier-godoy

pom.xml

@@ -342,7 +342,7 @@
                             <doclint>none</doclint>
                             <failOnWarnings>true</failOnWarnings>
                             <links>
-                                <link>https://javadoc.io/doc/com.vaadin/vaadin-platform-javadoc/${vaadin.version}</link>
+                                <link>https://javadoc.flowingcode.com/artifact/com.vaadin/vaadin-platform-javadoc/${vaadin.version}</link>
                             </links>
                         </configuration>
                      </plugin>