doc: make explicit reverting node_version.h changes

Add an explicit command to revert changes to `node_version.h` when
cherry-picking the release commit to the `master` branch.

PR-URL: #36461
Refs: #36460
Refs: #36385
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Danielle Adams <adamzdanielle@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: richardlau

doc/guides/releases.md

@@ -544,7 +544,13 @@ $ git cherry-pick v1.x^
 ```
 
 Git should stop to let you fix conflicts. Revert all changes that were made to
-`src/node_version.h`. If there are conflicts in `doc` due to updated `REPLACEME`
+`src/node_version.h`:
+
+```console
+$ git checkout --ours HEAD -- src/node_version.h
+```
+
+If there are conflicts in `doc` due to updated `REPLACEME`
 placeholders (that happens when a change previously landed on another release
 branch), keep both version numbers. Convert the YAML field to an array if it is
 not already one.