Try to make javadoc building work on JDK 23 and newer

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1923062 13f79535-47bb-0310-9956-ffa450edef68

build.gradle

@@ -215,7 +215,7 @@ subprojects {
                 if (jdkVersion > 8) addBooleanOption('html5', true)
                 addBooleanOption('Xdoclint:all,-missing', true)
                 links 'https://poi.apache.org/apidocs/dev/'
-                links 'https://docs.oracle.com/javase/8/docs/api/'
+                if (jdkVersion >= 23) links 'https://docs.oracle.com/en/java/javase/23/docs/api/' else links 'https://docs.oracle.com/javase/8/docs/api/'
                 links 'https://xmlbeans.apache.org/docs/5.0.0/'
                 links 'https://commons.apache.org/proper/commons-compress/apidocs/'
                 use = true