When running javadoc (doc-javahl target), link to the Java 11 API doc…

… (latest LTS release at the time of writing) instead of the farily old Java 6.

The API docs for 1.13 and 1.14 (in /site/publish/docs/javahl) has been generated using this link.

Obvious fix.

* Makefile.in



git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1891287 13f79535-47bb-0310-9956-ffa450edef68

Makefile.in

@@ -743,7 +743,7 @@ doc-api: mkdir-init
 doc-javahl:
 	$(JAVADOC) -d $(abs_builddir)/doc/javadoc \
 	  -sourcepath $(top_srcdir)/subversion/bindings/javahl/src \
-	  -link http://java.sun.com/javase/6/docs/api/ \
+	  -link https://docs.oracle.com/en/java/javase/11/docs/api/ \
 	  org.tigris.subversion.javahl \
 	  org.apache.subversion.javahl \
 	  org.apache.subversion.javahl.callback \