add gamefiend suggestion

Author: KyFaSt

share/github-backup-utils/ghe-restore-column-encryption-keys

@@ -24,8 +24,7 @@ ghe_remote_version_required "$GHE_HOSTNAME"
 : ${GHE_RESTORE_SNAPSHOT:=current}
 
 # Path to snapshot dir we're restoring from
-GHE_RESTORE_SNAPSHOT_PATH="$GHE_DATA_DIR/$GHE_RESTORE_SNAPSHOT"
-export GHE_RESTORE_SNAPSHOT
+: ${GHE_RESTORE_SNAPSHOT_PATH:="$GHE_DATA_DIR/current"}
 
 # Restore encrypted column encryption keying material if present
 log_info "Restoring encrypted column encryption keying material"