[Test] Fix test_log  (#24004)
[Test] Fix test_log  (#24004)

The test verifies the first line 43~51 bytes are "dashboard"

But due to recent code addition to head.py, the line where logs are written became 2 digits -> 3 digits

Previously,
2022-04-18 23:23:56,946	INFO head.py:[less than 100] -- Dashboard head grpc address: 127.0.0.1:57208
 
Now
2022-04-18 23:23:56,946	INFO head.py:101 -- Dashboard head grpc address: 127.0.0.1:57208
So we should increase the bytes range.
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray