Allow a float error for Regexp.timeout

The tests failed on windows

https://github.com/ruby/ruby/actions/runs/3440997073/jobs/5740085169#step:18:62
```
    1) Failure:
  TestRegexp#test_s_timeout [D:/a/ruby/ruby/src/test/ruby/test_regexp.rb:1586]:
  <0.30000000000000004> expected but was
  <0.3>.

    2) Failure:
  TestRegexp#test_timeout_shorter_than_global [D:/a/ruby/ruby/src/test/ruby/test_regexp.rb:1631]:
  <0.30000000000000004> expected but was
  <0.3>.
```

1 files changed, 6 insertions, 2 deletions

diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index 87ce6987e3..3479a9f212 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -1583,7 +1583,7 @@ class TestRegexp < Test::Unit::TestCase
       timeout = #{ EnvUtil.apply_timeout_scale(0.2).inspect }
     begin;
       Regexp.timeout = timeout
-      assert_equal(timeout, Regexp.timeout)
+      assert_in_delta(timeout, Regexp.timeout, timeout * 2 * Float::EPSILON)
 
       t = Time.now
       assert_raise_with_message(Regexp::TimeoutError, "regexp match timeout") do
@@ -1628,7 +1628,11 @@ class TestRegexp < Test::Unit::TestCase
       Regexp.timeout = global_timeout
 
       re = Regexp.new("^(a*)\\1b?a*$", timeout: per_instance_timeout)
-      assert_equal(per_instance_timeout, re.timeout)
+      if per_instance_timeout
+        assert_in_delta(per_instance_timeout, re.timeout, per_instance_timeout * 2 * Float::EPSILON)
+      else
+        assert_nil(re.timeout)
+      end
 
       t = Time.now
       assert_raise_with_message(Regexp::TimeoutError, "regexp match timeout") do