Fix link.

Link is pointing out to library (no .html) instead of library.html.

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MOS_MIGRATED_REVID=100366883
diff --git a/site/docs/skylark/rules.md b/site/docs/skylark/rules.md
index 7616f34..817fe3d 100644
--- a/site/docs/skylark/rules.md
+++ b/site/docs/skylark/rules.md
@@ -154,7 +154,7 @@
 ```
 
 This can be useful for exposing files generated with
-[ctx.new_file](library#modules.ctx.new_file). You can also have "implicit
+[ctx.new_file](library.html#modules.ctx.new_file). You can also have "implicit
 outputs", i.e. files that are declared in the rule, but not in the default
 outputs (like `_deploy.jar` in `java_binary`).