Update appveyor.yml

Author: TheTechsTech

appveyor.yml

@@ -35,7 +35,7 @@ install:
     # Get the MSSQL DLL's
     - ps: >-
         If ($env:PHP -eq "1") {
-            $DLLVersion = "5.6.0"
+            $DLLVersion = "5.6.1"
             cd c:\tools\php\ext
             $source = "http://windows.php.net/downloads/pecl/releases/sqlsrv/$($DLLVersion)/php_sqlsrv-$($DLLVersion)-$($env:php_ver_target)-nts-vc15-x64.zip"
             $destination = "c:\tools\php\ext\php_sqlsrv-$($DLLVersion)-$($env:php_ver_target)-nts-vc15-x64.zip"