Fix references to https://sites.google.com/site/skiadocs/.

make.bat

 @rem    Copyright 2011 Google Inc.
 @rem
 @rem    Use of this source code is governed by a BSD-style license that can be
 @rem    found in the LICENSE file.
 @ECHO OFF
 
 rem Launches make.py on Windows, after setting Visual Studio environment variables.
-rem See https://sites.google.com/site/skiadocs/user-documentation/quick-start-guides/windows
+rem See https://skia.org/user/quick/windows.
 
 rem Skip environment setup on bots.
 if "%CHROME_HEADLESS%"=="1" goto run_python
 
 if "%DevEnvDir%"=="" goto setup_env_vars
 
 :run_python
 rem Run make.py and propagate its return value.
 python make.py %*
 exit /B %ERRORLEVEL%
 
 :setup_env_vars
 rem Visual Studio environment variables aren't set yet, so run vcvars32.bat
 if DEFINED VS110COMNTOOLS (
     call "%VS110COMNTOOLS%..\..\VC\bin\vcvars32.bat"
 ) else if DEFINED VS100COMNTOOLS (
     call "%VS100COMNTOOLS%..\..\VC\bin\vcvars32.bat"
 ) else (
     goto error_no_VS
 )
 if %ERRORLEVEL% neq 0 exit /B %ERRORLEVEL%
 goto run_python
 
 :error_no_VS
 echo ERROR: Neither VS100COMNTOOLS nor VS110COMNTOOLS environment variable is set.
 echo Are you sure Visual Studio 2010 or 2012 is installed?
 exit /B 1