Fix test for PHP 8.2

[andypost]

The only failure

TEST 5/13 [tests/xhprof_005.phpt]
========DIFF========
001+ Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /home/skilld/aports/testing/php82-pecl-xhprof/src/xhprof-2.3.5/extension/tests/xhprof_005.php on line 42
002+ 
003+ Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /home/skilld/aports/testing/php82-pecl-xhprof/src/xhprof-2.3.5/extension/tests/xhprof_005.php on line 50
004+ 
005+ Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /home/skilld/aports/testing/php82-pecl-xhprof/src/xhprof-2.3.5/extension/tests/xhprof_005.php on line 50
006+ 
007+ Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /home/skilld/aports/testing/php82-pecl-xhprof/src/xhprof-2.3.5/extension/tests/xhprof_005.php on line 51
008+ 
009+ Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /home/skilld/aports/testing/php82-pecl-xhprof/src/xhprof-2.3.5/extension/tests/xhprof_005.php on line 53
     Verifying sleep_10000_micro...
     OK: sleep_10000_micro
     -------------
--
========DONE========
FAIL XHProf: Timer Tests
Author: Kannan [tests/xhprof_005.phpt] 

[andypost]

The roadmap https://wiki.php.net/todo/php82