Add missing mention of D3D12 support in a couple of places.

Author: baldurk

docs/index.rst

@@ -5,7 +5,7 @@ RenderDoc
 
 |renderdoc_logo|
 
-Welcome to RenderDoc - a graphics debugger currently available for D3D11, Vulkan and OpenGL development on windows.
+Welcome to RenderDoc - a graphics debugger currently available for Vulkan, D3D11, D3D12, and OpenGL development on windows.
 
 This document serves primarily as reference guide, introductory document and explanation of which features are available in RenderDoc and how to best use them.
 

docs/introduction.rst

@@ -5,7 +5,7 @@ Introduction
 
 |renderdoc_logo|
 
-Welcome to RenderDoc - a graphics debugger currently available for D3D11, Vulkan and OpenGL development on windows.
+Welcome to RenderDoc - a graphics debugger currently available for Vulkan, D3D11, D3D12, and OpenGL development on windows.
 
 This document serves primarily as reference guide, introductory document and explanation of which features are available in RenderDoc and how to best use them.
 

scripts/installer/customtext.wxl

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <WixLocalization Culture="en-us" xmlns="http://schemas.microsoft.com/wix/2006/localization">
 
-	<String Id="WelcomeDlgDescription">[ProductName] [ProductVersion] is a frame capture graphics debugger for Vulkan, D3D11 and OpenGL (https://github.com/baldurk/renderdoc).&#xa;&#xa;Click Next to continue or Cancel to exit Setup.</String>
+	<String Id="WelcomeDlgDescription">[ProductName] [ProductVersion] is a frame capture graphics debugger for Vulkan, D3D11, D3D12, and OpenGL (https://github.com/baldurk/renderdoc).&#xa;&#xa;Click Next to continue or Cancel to exit Setup.</String>
 	<String Id="MaintenanceWelcomeDlgDescription">[ProductName] [ProductVersion] is already installed.&#xa;&#xa;Click Next for options of to repair or remove it, or Cancel to exit the Setup Wizard.</String>
 
 	<String Id="AdvancedWelcomeEulaDlg_Title" Overridable="yes">[ProductName] [ProductVersion] Setup</String>