gh-143528: Fix test_time.test_thread_time() (GH-143558)

Tolerate 100 ms instead of 20 ms to support slow CIs.
(cherry picked from commit efaa56f)

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: vstinner

Lib/test/test_time.py

@@ -577,11 +577,10 @@ def test_thread_time(self):
 
         # thread_time() should not include time spend during a sleep
         start = time.thread_time()
-        time.sleep(0.100)
+        time.sleep(0.200)
         stop = time.thread_time()
-        # use 20 ms because thread_time() has usually a resolution of 15 ms
-        # on Windows
-        self.assertLess(stop - start, 0.020)
+        # gh-143528: use 100 ms to support slow CI
+        self.assertLess(stop - start, 0.100)
 
         info = time.get_clock_info('thread_time')
         self.assertTrue(info.monotonic)