doc: fix releases guide for recent Git versions

PR-URL: #53709
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Beth Griggs <bethanyngriggs@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/contributing/releases.md

@@ -819,7 +819,7 @@ Git should stop to let you fix conflicts.
 Revert all changes that were made to `src/node_version.h`:
 
 ```bash
-git checkout --ours HEAD -- src/node_version.h
+git restore --source=upstream/main src/node_version.h
 ```
 
 <details>