winhttp/tests: Fix a typo in ok() message.

dlls/winhttp/tests/winhttp.c

@@ -617,7 +617,7 @@ static void test_WinHttpAddHeaders(void)
         test_header_name, NULL, &len, &index);
     ok(ret == FALSE, "WinHttpQueryHeaders unexpectedly succeeded.\n");
     ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER,
-        "WinHttpQueryHeaders set incorrect error: expected ERROR_INSUFFICENT_BUFFER, go %u\n", GetLastError());
+        "WinHttpQueryHeaders set incorrect error: expected ERROR_INSUFFICENT_BUFFER, got %u\n", GetLastError());
     ok(len > 40, "WinHttpQueryHeaders returned invalid length: expected greater than 40, got %d\n", len);
     ok(index == 0, "WinHttpQueryHeaders incorrectly incremented header index.\n");