tests/net_hosted/ssl_verify_callback.py: Make exp match actual output.

The `cert` argument passed to the verify callback is actually a memoryview.
And the `depth` argument seems to start at 1 for the tested URL.
Signed-off-by: Damien George <damien@micropython.org>

tests/net_hosted/ssl_verify_callback.py.exp

-verify_callback: <class 'bytes'> True 2
-verify_callback: <class 'bytes'> True 1
-verify_callback: <class 'bytes'> True 0
-verify_callback_fail: <class 'bytes'> True 2
+verify_callback: <class 'memoryview'> True 1
+verify_callback: <class 'memoryview'> True 0
+verify_callback_fail: <class 'memoryview'> True 1
 MBEDTLS_ERR_ERROR_GENERIC_ERROR