generate_common.sh: fix updater-ng version detection

The implementation was invalid because it scanned only first line in
whole range. This new one scans every line in range for version field so
it correctly locates version.

helpers/generate_common.sh

@@ -75,7 +75,7 @@ updater_ng_repodetect() {
 	local REPO="$1"
 	local BOARD="${2:-mox}"
 	local VERSION="$(curl "https://repo.turris.cz/$REPO/packages/$BOARD/turrispackages/Packages" | \
-		awk '/^Package: updater-ng$/,/^$/ ^^ $1 == "Version:" { gsub(/-.*$/,"",$2); print $2 }')"
+		awk '/^Package: updater-ng$/,/^$/ { if ($1 == "Version:") { gsub("-.*$","",$2); print $2 } }')"
 	if [ -z "$VERSION" ]; then
 		echo "Detection of updater-ng version from repository failed. Using $UPDATER_VERSION instead."
 	else