Docs: fix broken link in Node.js API docs (#13307)

Kai Cataldo · web-flow · commit 7f1484690665 · 2020-05-19T12:40:50.000-04:00
As noted in #13302, this link is currently broken.
diff --git a/docs/developer-guide/nodejs-api.md b/docs/developer-guide/nodejs-api.md
@@ -1378,7 +1378,7 @@ ruleTester.run("my-rule", myRule, {
 
 ---
 
-[configuration object]: ../user-guide/configuring.md
+[configuration object]: ../user-guide/configuring
 [builtin-formatters]: https://eslint.org/docs/user-guide/formatters/
 [thirdparty-formatters]: https://www.npmjs.com/search?q=eslintformatter
 [eslint]: #eslint-class
