Update scripts for PHP 8.1.0

Author: shivammathur

scripts/Get-Php.ps1

@@ -36,7 +36,7 @@ if($ThreadSafe) {
 $branch = 'master'
 if($Version -eq '8.0') {
   $branch = 'PHP-8.0'
-} elseif($Version -eq '8.0') {
+} elseif($Version -eq '8.1') {
   $branch = 'PHP-8.1'
 }
 $semver = Invoke-RestMethod https://raw.githubusercontent.com/php/php-src/$branch/main/php_version.h | Where-Object { $_  -match 'PHP_VERSION "(.*)"' } | Foreach-Object {$Matches[1]}

scripts/Get-PhpNightly.ps1

@@ -33,7 +33,7 @@ $ts = '-nts'
 if($ThreadSafe) {
   $ts = ''
 }
-if($Version -eq '8.0') {
+if($Version -match '8.[0-1]') {
   Install-Php -Version $Version -Architecture $Architecture -ThreadSafe $ThreadSafe -InstallVC -Path $Path -TimeZone UTC -InitialPhpIni Production -Force
 } else {
   Invoke-WebRequest -UseBasicParsing -Uri "https://github.com/shivammathur/php-builder-windows/releases/download/php$Version/php-$Version.0-dev$ts-Win32-vs16-$Architecture.zip" -OutFile $Path\master.zip