gh-110695: test_asyncio uses 50 ms for clock resolution (#110952)

Before utils.CLOCK_RES constant was added (20 ms), test_asyncio
already used 50 ms.

Author: vstinner

Lib/test/test_asyncio/utils.py

@@ -37,9 +37,9 @@
 
 
 # Use the maximum known clock resolution (gh-75191, gh-110088): Windows
-# GetTickCount64() has a resolution of 15.6 ms.  Use 20 ms to tolerate rounding
+# GetTickCount64() has a resolution of 15.6 ms. Use 50 ms to tolerate rounding
 # issues.
-CLOCK_RES = 0.020
+CLOCK_RES = 0.050
 
 
 def data_file(*filename):