Fix path in mkdocs. (#645)

Author: Craigacp

docs/mkdocs.yml

@@ -2,7 +2,7 @@ site_name: ''
 site_url: https://tensorflow.org
 repo_url: https://github.com/tensorflow/java
 site_description: Documentation of TensorFlow Java API and tools.
-copyright: "© TensorFlow Authors 2025"
+copyright: "© TensorFlow Authors 2026"
 
 theme:
   name: material
@@ -45,5 +45,5 @@ nav:
       - index.md
   - Install:
       - install.md
-  - References:
-      - apidocs/index.html
+  - API Reference:
+      - references.md