htcu12+: update information about device specific changes to account for OTA release 1.53.xxx.y from HTC

Change-Id: I7d68192c1a003e09ddd64251928f93a21ee3bab2
diff --git a/_htc/htcu12+.markdown b/_htc/htcu12+.markdown
index 01d878c..cab6ec8 100644
--- a/_htc/htcu12+.markdown
+++ b/_htc/htcu12+.markdown
@@ -17,6 +17,7 @@
 Updates may break decrypt in TWRP.
 MTP is working starting with Release 3.2.3-1.
 Release 3.2.3-2 supports HTC´s firmware 1.30.xxx.y with security patch state of 1st September 2018.
+Release 3.2.3-3 supports HTC´s firmware 1.53.xxx.y with security patch state of 1st December 2018.
 
 {% include download.html %}
 
@@ -25,7 +26,8 @@
 Download the latest zip and install the zip using TWRP. Directly afterwards flash Magisk zip.
 
 If you do not already have TWRP installed:
-Download both the img and the zip. Make sure you download the img, that matches your current firmware´s security patch date before booting it! As of HTC´s Software Update 1.30.xxx.y the security patch state changed to 1st September 2018; to confirm which version to boot, take a look at the XDA thread! All the needed information is usually available there. You will need to have fastboot binaries and the correct drivers installed. Power off your device completely. Hold power button until device vibrates, when vibration kicks in let go of the power button and hit immediately volume down button. Your device should now be in the bootloader. Boot now to download mode. Connect the device to your PC. Open a command window and run the following command from the proper location:
+Download both the img and the zip. Make sure you download the img, that matches your current firmware´s security patch date before booting it! As of HTC´s Software Update 1.30.xxx.y the security patch state changed to 1st September 2018.
+As of HTC´s Software Update 1.53.xxx.y the security patch state changed to 1st December 2018. To confirm which version to boot, take a look at the XDA thread! All the needed information is usually available there. You will need to have fastboot binaries and the correct drivers installed. Power off your device completely. Hold power button until device vibrates, when vibration kicks in let go of the power button and hit immediately volume down button. Your device should now be in the bootloader. Boot now to download mode. Connect the device to your PC. Open a command window and run the following command from the proper location:
 
 fastboot boot path/to/twrp.img