test: Fix test_watchdog_reset for newer revisions of ESP32-C5

When verify_output is called in test_watchdog_reset, it read only 100
characters which was not enough to check if correct message was printed

Author: Dzarda7

test/test_esptool.py

@@ -326,7 +326,7 @@ def verify_output(self, expected_out: list[bytes]):
         # "Hello world" data without unwanted chip reset.
         with serial.serial_for_url(arg_port, arg_baud, rtscts=True) as p:
             p.timeout = 5
-            output = p.read(100)
+            output = p.read(200)
             print(f"Output: {output}")
             assert any(item in output for item in expected_out)