Improve the discoverability of Java and Kotlin APIs

This commit add external links in the refdoc to Java
and Kotlin APIs to make them more discoverable.

Closes gh-32835

Author: sdeleuze

framework-docs/modules/ROOT/nav.adoc

@@ -451,5 +451,6 @@
 ** xref:languages/groovy.adoc[]
 ** xref:languages/dynamic.adoc[]
 * xref:appendix.adoc[]
-* {spring-framework-wiki}[Wiki]
-
+* {spring-framework-docs-root}/{spring-version}/javadoc-api/[Java API,window=_blank, role=link-external]
+* {spring-framework-api-kdoc}/[Kotlin API,window=_blank, role=link-external]
+* {spring-framework-wiki}[Wiki, window=_blank, role=link-external]

framework-docs/package.json

@@ -4,7 +4,7 @@
     "@antora/atlas-extension": "1.0.0-alpha.2",
     "@antora/collector-extension": "1.0.0-alpha.3",
     "@asciidoctor/tabs": "1.0.0-beta.6",
-    "@springio/antora-extensions": "1.11.1",
+    "@springio/antora-extensions": "1.14.2",
     "@springio/asciidoctor-extensions": "1.0.0-alpha.10"
   }
 }