Default [Q] [HELP] Restore HTC One to stock

Hi,

I have rooted my HTC One M7_U before I check that HTC will roll out sense 6 update for HTC One, so now I need to restore back to stock to be able to install the OTA once available, but I cannot find the right file to download (RUU or stock recovery or Nandroid backup)
here my device's fastboot getvar all :

(bootloader) version: 0.5
(bootloader) version-bootloader: 1.56.0000
(bootloader) version-baseband: 4A.25.3263.21
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.19.401.5
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) meid: 00000000000000
(bootloader) product: m7_u
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0711000
(bootloader) cidnum: HTC__J15
(bootloader) battery-status: good
(bootloader) battery-voltage: 4042mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-c6bbb6d4
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0

please help me find the right file to download
Thank you