Fix Windows CI

The path to mysql.exe changed. Fortunately, chocolately puts the folder
containing the exe in the PATH environment variable, so we don't even
need to provide an absolute path.

Author: nielsdos

.github/scripts/windows/test_task.bat

@@ -32,8 +32,7 @@ set PDO_MYSQL_TEST_PASS=%MYSQL_PWD%
 set PDO_MYSQL_TEST_HOST=%MYSQL_TEST_HOST%
 set PDO_MYSQL_TEST_PORT=%MYSQL_TEST_PORT%
 set PDO_MYSQL_TEST_DSN=mysql:host=%PDO_MYSQL_TEST_HOST%;port=%PDO_MYSQL_TEST_PORT%;dbname=test
-set TMP_MYSQL_BIN=C:\mysql\bin
-"%TMP_MYSQL_BIN%\mysql.exe" --host=%PDO_MYSQL_TEST_HOST% --port=%MYSQL_TEST_PORT% --user=%MYSQL_TEST_USER% --password=%MYSQL_TEST_PASSWD% -e "CREATE DATABASE IF NOT EXISTS test"
+mysql --host=%PDO_MYSQL_TEST_HOST% --port=%MYSQL_TEST_PORT% --user=%MYSQL_TEST_USER% --password=%MYSQL_TEST_PASSWD% -e "CREATE DATABASE IF NOT EXISTS test"
 if %errorlevel% neq 0 exit /b 3
 
 rem setup PostgreSQL related exts