bpo-41729: Fix test_winconsole failures (3) and hang (GH-22146)

The problems occured with a repository build on machine
with freshly updated Windows 10 Pro.
diff --git a/PC/_testconsole.c b/PC/_testconsole.c
index f6fcfcf..b62f21c 100644
--- a/PC/_testconsole.c
+++ b/PC/_testconsole.c
@@ -63,7 +63,7 @@
     for (DWORD i = 0; i < size; ++i, ++p, ++prec) {
         prec->EventType = KEY_EVENT;
         prec->Event.KeyEvent.bKeyDown = TRUE;
-        prec->Event.KeyEvent.wRepeatCount = 10;
+        prec->Event.KeyEvent.wRepeatCount = 1;
         prec->Event.KeyEvent.uChar.UnicodeChar = *p;
     }