doc: filter out merge-script from list of authors

doc/release-process.md

@@ -98,7 +98,7 @@ For the period during which the notes are being edited on the wiki, the version
 
 Generate list of authors:
 
-    git log --format='- %aN' v(current version, e.g. 24.0)..v(new version, e.g. 24.1) | sort -fiu
+    git log --format='- %aN' v(current version, e.g. 24.0)..v(new version, e.g. 24.1) | grep -v 'merge-script' | sort -fiu
 
 ### Setup and perform Guix builds