doc: correct Nodejs to Node.js spelling

PR-URL: #33088
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

doc/guides/diagnostic-tooling-support-tiers.md

@@ -25,7 +25,7 @@ the following tiers.
   * The tool must have a guide or other documentation in the Node.js GitHub
     organization or website;
   * The tool must be working on all supported platforms;
-  * The tool must only be using APIs exposed by Nodejs as opposed to
+  * The tool must only be using APIs exposed by Node.js as opposed to
     its dependencies; and
   * The tool must be open source.