add fix to pom.xml that is supposed to fix the things

Author: carlosuc3m

.github/workflows/build.yml

@@ -24,6 +24,7 @@ jobs:
         with:
           java-version: '11'
           distribution: 'zulu'
+          cache: 'maven'
       - name: Set up CI environment
         run: .github/setup.sh
       - name: Execute the build

.github/workflows/debug-javadoc-classpath.yml

@@ -145,5 +145,14 @@
       			</includes>
     		</resource>
   		</resources>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-javadoc-plugin</artifactId>
+				<configuration>
+					<legacyMode>true</legacyMode>
+				</configuration>
+			</plugin>
+		</plugins>
 	</build>
 </project>