Bug: `ResponseTest::testSetDateRemembersDateInUTC` depends on time

[kenjis]

There was 1 failure:

1) CodeIgniter\HTTP\ResponseTest::testSetDateRemembersDateInUTC
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'Sat, 11 Mar 2000 04:25:54 GMT'
+'Sat, 11 Mar 2000 04:25:53 GMT'

/home/runner/work/CodeIgniter4/CodeIgniter4/tests/system/HTTP/ResponseTest.php:154

https://github.com/codeigniter4/CodeIgniter4/runs/4578323769?check_suite_focus=true

[kenjis]

1) CodeIgniter\HTTP\ResponseTest::testSetDateRemembersDateInUTC
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'Sat, 11 Mar 2000 02:00:02 GMT'
+'Sat, 11 Mar 2000 02:00:01 GMT'

/home/runner/work/CodeIgniter4/CodeIgniter4/tests/system/HTTP/ResponseTest.php:154

https://github.com/codeigniter4/CodeIgniter4/runs/8006876684?check_suite_focus=true

[kenjis]

1) CodeIgniter\HTTP\DownloadResponseTest::testSetDateRemembersDateInUTC
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'Fri, 10 Mar 2000 12:10:14 GMT'
+'Fri, 10 Mar 2000 12:10:13 GMT'

/home/runner/work/CodeIgniter4/CodeIgniter4/tests/system/HTTP/DownloadResponseTest.php:60

https://github.com/codeigniter4/CodeIgniter4/actions/runs/3189277108/jobs/5202899418