doc: fix releases guide for recent Git versions

PR-URL: nodejs#53709
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Marco Ippolito <[email protected]>
Reviewed-By: Beth Griggs <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: James M Snell <[email protected]>

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>