Rename ESP label VTOYEFI → HISOEFI

We are not Ventoy. The ventoy_check_official_device label check is already
bypassed via patch_ventoy_212.py's early return 0, so this is safe.

scripts/package_release.sh

@@ -224,10 +224,8 @@ fi
 
 _progress 6 "Creating 32MB FAT16 ESP image ($(find "$ESP_STAGING" -type f | wc -l) files, $(du -sh "$ESP_STAGING" | cut -f1))..."
 dd if=/dev/zero of="$ESP_IMG" bs=1M count=32 2>/dev/null
-# FAT16 volume label MUST be "VTOYEFI" (modsrc's GRUB hardcodes
-# this check at ventoy_check_official_device). Using "HISOEFI" here
-# would fail with error 10 "Partition name is not VTOYEFI".
-mkfs.vfat -F 16 -n "VTOYEFI" "$ESP_IMG" >/dev/null 2>&1
+# FAT16 volume label "HISOEFI" — we are not Ventoy.
+mkfs.vfat -F 16 -n "HISOEFI" "$ESP_IMG" >/dev/null 2>&1
 
 _progress 7 "Populating ESP (single mcopy)..."
 # mcopy with a wildcard of subdirs + ::/  does not recurse reliably

src/installer/tool/hiperiso_lib.sh

@@ -381,7 +381,7 @@ EOF
     for i in 0 1 2 3 4 5 6 7 8 9; do
         check_umount_disk "$PART2"
 
-        if mkfs.vfat -F 16 -n VTOYEFI -s 1 $PART2; then
+        if mkfs.vfat -F 16 -n HISOEFI -s 1 $PART2; then
             echo 'success'
             break
         else
@@ -504,7 +504,7 @@ format_hiperiso_disk_gpt() {
     for i in 0 1 2 3 4 5 6 7 8 9; do
         check_umount_disk "$PART2"
         
-        if mkfs.vfat -F 16 -n VTOYEFI -s 1 $PART2; then
+        if mkfs.vfat -F 16 -n HISOEFI -s 1 $PART2; then
             echo 'success'
             break
         else