Add Jetty libraries to Javadoc build

Author: bclozel

spring-boot-project/spring-boot-docs/pom.xml

@@ -467,6 +467,16 @@
 <artifactId>javax-websocket-server-impl</artifactId>
 <optional>true</optional>
 </dependency>
+<dependency>
+<groupId>org.eclipse.jetty</groupId>
+<artifactId>jetty-alpn-conscrypt-server</artifactId>
+<optional>true</optional>
+</dependency>
+<dependency>
+<groupId>org.eclipse.jetty.http2</groupId>
+<artifactId>http2-server</artifactId>
+<optional>true</optional>
+</dependency>
 <dependency>
 <groupId>org.flywaydb</groupId>
 <artifactId>flyway-core</artifactId>