doc: replace EOL versions in README

PR-URL: #47833
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

README.md

@@ -43,7 +43,7 @@ Looking for help? Check out the
 
 * **Current**: Under active development. Code for the Current release is in the
   branch for its major version number (for example,
-  [v15.x](https://github.com/nodejs/node/tree/v15.x)). Node.js releases a new
+  [v19.x](https://github.com/nodejs/node/tree/v19.x)). Node.js releases a new
   major version every 6 months, allowing for breaking changes. This happens in
   April and October every year. Releases appearing each October have a support
   life of 8 months. Releases appearing each April convert to LTS (see below)
@@ -74,8 +74,8 @@ Binaries, installers, and source tarballs are available at
 The [latest](https://nodejs.org/download/release/latest/) directory is an
 alias for the latest Current release. The latest-_codename_ directory is an
 alias for the latest release from an LTS line. For example, the
-[latest-fermium](https://nodejs.org/download/release/latest-fermium/) directory
-contains the latest Fermium (Node.js 14) release.
+[latest-hydrogen](https://nodejs.org/download/release/latest-hydrogen/)
+directory contains the latest Hydrogen (Node.js 18) release.
 
 #### Nightly releases