[PATCH] wininet/tests: Increase the maximum expected available data value.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=61054

Your paranoid android.


=== debian10 (32 bit report) ===

wininet:
http.c:4946: Test failed: expected 1 pending read, got 2

=== debian10 (32 bit Japanese:Japan report) ===

wininet:
http.c:5034: Test failed: expected 1 pending read, got 2