8310075: Revert accidental change to jcheck configuration for shenandoah project

Reviewed-by: ysr, kdnilsen, shade

Author: William Kemper

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
-project=jdk
+project=shenandoah
 jbs=JDK
-version=21
+version=22
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists
@@ -22,7 +22,7 @@ ignore-tabs=.*\.gmk|Makefile
 message=Merge
 
 [checks "reviewers"]
-reviewers=1
+committers=1
 ignore=duke
 
 [checks "committer"]